Which sentence has correct punctuation?

The passage is written in a narrative style with a mix of description and events. It mentions a specific character (Lydia) and introduces a setting and an upcoming event (Halloween costume contest). This style and content suggest that it is likely a short story.

Option A is correctly punctuated. It uses the possessive form "student's" to indicate that the friend belongs to the working student.

The possessive apostrophe is placed after "student" and before the "s" to indicate that the friend is singular and not plural.

Proofreading is the final step, where you check for spelling and grammar mistakes. The other steps happen earlier in the writing process.

Option C is most likely to be found in an email from a professor to her biology students at a college because it contains specific information related to the class schedule and activities. It mentions the research groups from a specific class meeting time, and gives a location where they should meet, which suggests it is a message intended for students in that class. Options A, B, and D are more likely to be found in casual conversations or in other types of messages not directly related to the biology class.

The Krebs cycle, part of cellular respiration, happens in the mitochondria. Fermentation and glycolysis happen in the cytoplasm, and photosynthesis occurs in plant cells' chloroplasts.

A compound sentence is a sentence that consists of two or more independent clauses joined by a conjunction. Example: "I like my job, but I like this more." This sentence has two independent clauses, "I like my job" and "I like this more," joined by the conjunction "but."

"Ran" is the correct past tense of "run." The word "runned" is incorrect, "running" is the present participle, and "rant" is a different word.

A complex-compound sentence has at least two independent clauses and one dependent clause. This sentence correctly combines all three parts.

In the sentence, "The pumpkin crop was incredibly small this year because of excessive rain in the spring and he", the word "incredibly" is an adverb. Adverbs are words that modify verbs, adjectives, or other adverbs. In this case, "incredibly" modifies the adjective "small," indicating the degree or intensity of the smallness of the pumpkin crop.

Checking for spelling is a step in the proofreading process. Proofreading involves reviewing a written document for errors and making corrections as necessary. This can include checking for spelling errors, grammar mistakes, punctuation errors, and formatting issues.