Which sentence uses the word relevant correctly?

a. any relevant information can be phoned in to the police department.

b. it doesn't matter how relevant your garden is if you don't water it.

c. the butterflies' wings were so relevant that they seemed painted.

d. the chowder was hot and relevant.

A. Any relevant information can be phoned in to the police department

Explanation:

The definition(s) of relevant is

having significant and demonstrable bearing on the matter at hand

closely connected or appropriate to what is being done or considered

We can use this information and context clues to figure out that this is in fact the correct defintion.

Any closely connected information can be phoned into the police department.

they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.