Lashley's Studies, in Which Rats Learned a Maze and Then

Lashley's studies, in which rats learned a maze and then had various parts of their brains surgically removed, showed that the memory

A) was lost when surgery took place within 1 hour of learning.
B) was lost when surgery took place within 24 hours of learning.
C) was lost when any region of the brain was removed.
D) remained no matter which area of the brain was tampered with.