Thorndike Found That the Cats in His Puzzle Boxes Learned

Thorndike found that the cats in his puzzle boxes learned to escape from the box, and that the time required to escape decreased gradually over trials. Thorndike believed that this was evidence that cats were not necessarily thinking or understanding (even though they were learning) . What pattern of results would provide evidence that cats were "thinking", according to Thorndike?

A) initial evidence of very short durations that remain unchanged
B) long durations for intelligent cats and short durations for unintelligent cats
C) initial long durations followed by a sharp, permanent drop in duration once cats recognized the solution to the problem
D) long durations, then shorter durations, then longer durations again as cats took their time to escape carefully