______ sets man apart from the rest of the animals is his ability to use work tools.

A．The painting is named "Double Tree".
B．That sounds wonderful.
C．You always say big words.
D．What size do you wear, sir

A．2 most probably means ______.A. we suffer because of being sensitiveB. our sensitivity costs us a great dealC. we have to pay the dentist for his making us sensitive to painD. we are lucky to have developed our senses