Question

the phase of the moon that occurs between the sun and earth
new moon
full moon
waxing crescent
waning crescent

Explanation:

The question is about the moon phase between the sun and Earth. During a new moon, the moon is positioned between the sun and Earth, with the side facing Earth not illuminated (or nearly so) as the sun's light is on the opposite side. Full moon is when Earth is between sun and moon; waxing/waning crescent are phases after new moon (waxing) or before new moon (waning) but not the one directly between sun and Earth.

Answer:

A. New Moon