Crows and Ravens Have Demonstrated a Wide Variety of Tool

Multiple Choice

Crows and ravens have demonstrated a wide variety of tool using behaviors. That many of those behaviors involve "insight" is suggested by

A) some of the ravens performing a behavior that is not normally performed in the wild.
B) some of the ravens performing a correct response even though no other bird in the group had performed the behavior.
C) some of the ravens solving the problem immediately without going through a learning process.
D) Each of the above offers support for "insight."