A．They generally prefer cutting down large trees to small trees.
B．They do not travel long distances to cut down large trees.
C．They will not cut down large trees of certain species.
D．They use large trees mainly for the purpose of building shelters.

A．Beavers are safer from their enemies at night.   
B．Beavers stay with their offspring during the daytime.
C．Looking for food at night requires less energy.   
D．Beavers face less competition for food from other animals.

A．It accurately represents the behavior of the dinosaur. 
B．Its name resulted from an incorrect translation.
C．It was probably taking care of the eggs.
D．It influenced popular attitudes toward dinosaurs.