What Was the Rate of Cooling and the Environment of Formation

Multiple Choice

What was the rate of cooling and the environment of formation for an extrusive igneous rock and why?

A) Slow because the magma was insulated below the surface
B) Fast because it was erupted from a volcano
C) Slow because it cooled in a volcanic lava flow far from the vent
D) Fast because it cooled 6 kilometers below the surface