I think the correct answer is A.
Answer:
I'd say "main idea" is your answer.
Explanation:
You're supposed to state the subject in a few words or in a phrase, and "The general topic, content, and ideas contained in the text." can be summarized to be "main idea".
Hope this helps :)
Sorry, in advanced, if it's wrong.
B.
A nominative absolute is a phrase that starts or ends a sentence and has no grammatical relation with the rest of the sentence.
When you do a experiment you are testing the chemicals it has molclues
B. Many people lost their jobs during the Great Depression.
the phrase “Great Depression” is a proper noun so it needs to be capitalized