For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. I raked my brains to solve this difficult problem.
A). I consulted several people
B). I subjected my mind to hard thinking
C). I read number of books
D). I brainwashed several experts
E). I used my common sense
I subjected my mind to hard thinking
raked my brains: to think very hard.