10Points!Please Help!

Which words in the sentence make up the adverb phrase? Which words do the adverb phrase modify?

A herd of elephants can cover 50 miles a day during the summer.

A.can cover; modifies A herd of elephants
B.during the summer; modifies can cover
C.during the summer; modifies 50 miles a day
D.A herd of elephants; modifies can cover

I've narrowed it down to B and C

Respuesta :

           The answer would be A.  Another possibility is C. Hope this helped :)
ayah1
A is verb and D is noun
during the summer is the adverb phrase
The answer is B
It modifies can cover. To find out what an adverb phrase mofies, you ask “how”, “where”, “why”, or “when.”  Ask when does the elephant cover...? The answer is during the summer.