Answer: B. A comparison of the two books.
Explanation: the word compare means to estimate, measure, or note the similarity or dissimilarity between Things. If you remove ‘them’ all what is there to compare to each other? Nothing. Making the answer the latter sentence.
Answer:
B. Idea
Bold - (of a person, action, or idea) showing an ability to take risks; confident and courageous.
I mean I guess I'll give top 9-10 for this answer;
"better late the never"
"break a leg"
"hit the hay"
"A spades a spade"
"piece of cake"
"See eye to eye"
"The cats out of the bag"
"dont judge a book by its cover"
"No pain no gain"
"speak of the devil"