For one of the studies, scientists from Canada noted a sharp decrease in ______ kinds of great sharks since the nineteen eighties.

A. The malaria parasites will grow and divide in the kidney.
B. The red blood cells will then be invaded by the parasites which reproduce thousands of times later.
C. The parasites cause a person’s body temperature to rise.
D. People with malaria may suffer kidney failure or loss of red blood cells.

A. Because there are fewer sharks in Asia.
B. Because shark fins can be used for medical purposes and for food.
C. Because shark fins are poisonous.
D. Because shark fins are expensive.