Select the most appropriate idiom that can substitute the highlighted segment in the given sentence.
She was feeling under the weather, so she decided to go to bed in order to sleep.

Correct option is D

Option (d) is the correct meaning of the given idiom.
Given Idiom: "Hit the sack" means to go to bed or sleep (सोने जाना). It is used informally when someone is tired or unwell.
Example: I’m really exhausted, I think I’ll hit the sack early tonight.
Other related idioms and their meanings:
· (a) cry over spilled milk – regret something that cannot be undone (जो हो गया उसका पछतावा करना)
· (b) break a leg – wish someone good luck (शुभकामनाएं देना)
· (c) bark up the wrong tree – to make a wrong assumption (गलत दिशा में प्रयास करना)