ACCORDING TO THE PASSAGE, WE LEARN THAT _____.A. APES ARE SURE TO...

38. According to the passage, we learn that _____.

A. apes are sure to be cleverer than crows

B. crows and apes can find a way out only after trying

C. crows and apes can think through hard problems by using tools

D. crows and apes have thought of the result before action