What is the passage?
lol, Parentheses are generally used as an explanation or afterthought into a passage that is grammatically already complete without the stuff in the parentheses. In writing it is u usually marked with curved brackets.
Example: He finally answered (after taking five minutes to think) that he did not understand the question.
I hope that this helps....
C is the correct sentence.
All the others include a predicate, or a time, but not a subject
Education shows us the importance of hard work and, at the same time, helps us grow and develop.
The answer to the first analogy (mystery:clue :: eraser:) would be letter d. open. Mystery is to clue while eraser is to open. The answer to the second analogy (habit: custom :: extravagant: ) would be letter c. lavish.