Which passage from the article best supports the idea that crows aren't easily fooled?
A.And if someone does happen to mess with one of them, watch out—crows will remember the person's face.
B.Researchers wearing rubber face masks trapped and banded multiple crows and then released them.
C.It wasn't just the banded birds screeching and attacking the researchers in the dangerous mask, either.
D.The scientists even took the test a step further by turning the dangerous masks upside down. That trick only confused the birds momentarily.