Use the Following Information to Answer the Question Below

Multiple Choice

Use the following information to answer the question below.

Activity of various enzymes at various temperatures (a) and at various pH (b)
Which temperature and pH profile curves on the graphs are most likely associated with an enzyme isolated from a human stomach where conditions are strongly acid?

A) curves 1 and 4
B) curves 1 and 5
C) curves 2 and 4
D) curves 3 and 4