Which combination contains sentences that correctly use idiomatic expressions?
(A). He hit the nail on the head by solving the issue.
(B). I am feeling under the weather today.
(C). She let the cat in the bag during the meeting.
(D). We'll cross that bridge when we come to it.
Step-by-step Solution:
Sentence (A), (B), and (D) use idiomatic expressions correctly. Sentence (C) is incorrect; the correct idiom is 'let the cat *out of* the bag'.