If, with Steady State Heat Flow Established, You Double the Thickness

Multiple Choice

If, with steady state heat flow established, you double the thickness of a wall built from solid uniform material, the rate of heat loss for a given temperature difference across the thickness will

A) become one-half its original value.
B) also double.
C) become one-fourth its original value.
D) become 1/ $\sqrt { 2 }$ of its original value.
E) become four times its original value.