Subjective sentences are from the <u>opinion of the speaker</u>.
-"San Francisco is the coolest city in America." is subjective because the speaker is saying an opinion on San Fransisco. It <u>cannot be backed up by facts.</u>
<u>Objective sentences</u> are the opposite of subjective sentences. They can be backed up by evidence.
B, C, and D can be proven by evidence, and they also have no opinion in them. Therefore, B, C, and D, are objective sentences.
<em>Option A, San Francisco is the coolest city in America, would be your best choice.</em>