Use the Incomplete Diagram Below, Illustrating Some of the Steps

Multiple Choice

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions.
Figure 55.3
-What would be a likely entry for box A?

A) increased temperature
B) elimination of zooplankton
C) increased sunlight
D) fertilizers washed into the lake
E) increased ultraviolet radiation