Because of all your running around, their clients are confused about whose in charge, and the company is losing its competitive edge. Which of the following contractions should be used to correct the error in the sentence above?

A complete sentence has a subject (noun), verb, capital letters, punctuation and finally must make sense. B is the only complete sentence that explains the action and nouns in a way that makes sense.

The statement used in Dis more correct as it explains the connection between the action in the sentence and the resulting outcome.
It also applies expanded form of sentences making it more formal.

The subject is in plural “tennis balls” and is supported by a plural verb “roll” which makes D the correct use of subject-verb agreement.

The plural of words ending with “f” are usually replaced with “ves” at the end, making the C the correct answer.

Choice B is the correct answer because it contains a dangling modifier, which is a type of misplaced modifier.

A dangling modifier occurs when a modifying phrase or clause in a sentence does not clearly and logically modify any specific word or phrase in the sentence. It "dangles" without a clear connection to the intended subject.

In Choice B, the phrase "that needed paint" is the dangling modifier. It is intended to modify either the old truck or the garage, but it is not clear which one. The sentence structure suggests that the truck is the one that needs paint, but the modifier is placed immediately after the word "garage," creating confusion.

An adjective isa descriptive word that modifies (describes) a noun. In this case, lively is used to describe the lady (noun).

In Option A, the em dash is used to set off the list of tools (hammers, saws, chisels) from the main part of the sentence. The em dash indicates a stronger break than a comma and helps to provide clarity and emphasis on the list of tools the carpenter must use. The sentence is correctly punctuated, and the tools are appropriately separated by the em dash.

"Statistics is an interesting subject. However, statistics is often misleading."

In this sentence, both the subject "Statistics" and the verb "is" are in agreement, as they are both singular. The subject-verb agreement rule states that singular subjects should be paired with singular verbs, and plural subjects should be paired with plural verbs. "Statistics" is a singular noun, so it should be paired with the singular verb "is." The other choices have subject-verb agreement errors because they mix singular and plural forms incorrectly.

Who’s is the right replacement for whose because it shows “who is” responsible for something, which fits perfectly into the sentence.

"We sat down to eat our meal outside; the night was beautiful." The semicolon (;) is used correctly in this choice.

Choice A has a comma before and which makes it incorrect.
Choice C has an s after the apostrophe in ladies's, hence it is incorrect.

Choice D also has a comma before and making it incorrect.
Note: And is a joining word and hence should not have commas before or after it.