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 was undecided. He let the grass grow under his feet.

A loitered around

B stayed out

C sat unmoving

D moved away

ANS:A - loitered around

No answer description is available.