In Order to Determine Direction Using Polarized Light, an Ant

In order to determine direction using polarized light, an ant must be able to see

A) the sun, and its location in the sky.
B) the majority of the sky on a cloudless day (even if the sun itself is blocked) .
C) the majority of the sky, even if it is overcast.
D) a small part of the sky that need not include the sun.
E) both the sun and an object reflecting the sun.