What Is the Approximate Dihedral Angle Between the Two Chlorine $\circ$

What is the approximate dihedral angle between the two chlorine atoms in the diaxial conformation of trans-1,2-dichlorocyclohexane?

A) 0 ^$\circ$
B) 60 ^$\circ$
C) 120 ^$\circ$
D) 180 ^$\circ$