There Are Two Conductors, a Red and a Blue Installed

Multiple Choice

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for grounds. How should the two leads of the MEGGER should be connected?

A) one to the blue lead and one to the conduit
B) one to the red lead and one to the conduit
C) one to the blue lead and one to the red lead
D) both a and b above