Idioms and Phrases - Verbal and Reasoning

In the following questions four alternatives are given for the idiom/phraseitalicised and underlinedin the sentence. Choose the alternative which best expresses the meaning of idiom/phrase.
Q1:

He went to his friend's house in the evening as was his wont.

A as usual

B as he wanted

C as his want was

D as he wanted that day

ANS:A - as usual

No answer description is available.