The common noun here is "frog" as the only other noun, Many, is not a common noun - it's a proper noun.
"frog" here is the object of the sentence: it's the object of the verb "caught" of which the subject is Mary
Answer:
C) a creative person with flexible mind.
Explanation:
He feels that he should have created something important by that moment, and he is worried that his life is passing by without him accomplishing anything.
I think the answer is "words that seem opposite or different" because it somewhat indicate a sentence which contains a comparison context clue.
