HELP PLEASE!! Read these words from The Hobbit.

...their small knives, the only weapons they had, would have been of no use against the arrows of the elves that could hit a bird's eye in the dark.

What does "could hit a bird's eye in the dark" mean?

A. The elves hunt birds with arrows.

B. The elves practice shooting targets at night.

C. The elves can only see at night.

D. The elves have very good aim.