The Following Are All Main Points of the Article Animal

Multiple Choice

The following are all main points of the article Animal Sculptors of the Seafloor except:

A) Gray whales feed in a way that preserves habitat of their prey
B) Biological activities can alter large expanses of seafloor.
C) The previous ideas about the feeding biology of large marine mammals were refined.
D) Feeding activities enhance the area's productivity.
E) Walruses overgrazed clam beds, causing environmental collapse.