In the given question, three statements are given with an idiom highlighted. You have to select the answer choice that states the combination of statements in which the idiom or phrase has been correctly used.
i. Seeing the cops, the arsonists started raining cats and dogs .
ii. It's no use crying over spilt milk - it was a bad investment; the money has been lost and there's nothing we can do.
iii. He was able to recover from his losses because he didn't put all his eggs in one basket.

'Crying over spilt milk' means to express regret about something that has already happened or cannot be changed; this indicates that the money cannot be regained, and it is of no use to regret about the same. 'Put all eggs in one basket' means to depend for your success on a single person or plan of action; this indicates that the man was able to survive through and recover from his losses because he had not invested all his money in one scheme or institution. If it 'rains cats and dogs' it rains heavily; this does not give out a meaningful sentence because the arsonists might have run away on seeing the police. This is not the implied meaning with the use of idiom. Hence, a) is the correct answer.