Enzymes are both pH and temperature specific. Seen here are the reaction rates of three common digestive enzymes. Based on the data, which enzyme's optimum activity occurs in a basic environment while another's is very acidic?

A) basic - trypsin; acidic - pepsin

B) basic - amylase; acidic - pepsin

C) basic - pepsin; acidic - trypsin

D) basic - trypsin; acidic - amylase