school has seven classrooms: 1, 2, 3, 4, 5, 6, and 7. The principal must choose five students, each from a different classroom, to perform in a special play. Any combination of five students will be appropriate, except if a student from classroom 1 is selected, then no one from class 5 may be chosen. Also, if a student from class 3 is selected, then someone from classroom 5 must also be selected. If someone from classroom 2 is in the play, then a student from classroom 6 must also be selected. Which combination of students meets all of the criteria?

A. consider your past experiences with the candidate: While your past experiences may influence your feelings about the candidate, they do not directly help you analyze or evaluate the article's argument. It’s important to focus on the substance of the article itself, not personal biases or prior interactions with the candidate.
B. refute the opinions presented in the article: Refuting the opinions presented in the article may be an option later, but it should not be your initial step. First, it’s crucial to understand and evaluate the argument being made, rather than simply disagreeing with it outright.
C. identify the personal importance of the regulation: While understanding how the regulation personally affects you can be valuable, it is not the primary step in evaluating the argument. A well-rounded evaluation requires you to assess the merit of the argument itself, not just how it might impact you personally.
D. focus your attention on the argument being made: This is the best approach. To draw a fair and informed conclusion about the article, you should first focus on the argument presented within it. Analyze the reasoning, evidence, and claims made about the new air traffic control regulations, and only then form a reasoned opinion or conclusion.

A. Conduct a survey of those who drink orange juice to prevent a cold: While a survey might provide some data on people's behaviors, it wouldn't establish a cause-and-effect relationship between drinking orange juice and preventing the common cold. Surveys can show trends, but they can't confirm scientific conclusions without controlled experimental data.

B. Review the chemical composition of orange juice: Understanding the composition of orange juice (such as its vitamin C content) is important, but it doesn't directly address whether it prevents colds. The researcher needs to look at studies that investigate the outcome of drinking orange juice, not just its ingredients.

C. Drink orange juice when a cold is coming on: This is more of a personal action than a scientific approach. The researcher would need to gather evidence from controlled studies rather than relying on personal experience or anecdotal evidence.

D. Analyze the research data found in the scientific journals: This is the best method. Reviewing existing scientific studies allows the researcher to see what previous research has found about the relationship between orange juice and cold prevention. Published studies typically include controlled experiments, systematic reviews, and meta-analyses that provide reliable evidence and conclusions.