Refer to the Figure

Multiple Choice

Refer to the figure.
In Grutter's studies in the Great Barrier Reef off of Australia, he measured the number of fish species and the number of individual fish on the parts of the reef where cleaner fish were present (controls) and where cleaner fish had been removed (experimental) . Based on the figures, what is the best conclusion that can be drawn regarding the effects of cleaner fish on reef fish abundance and diversity?

A) The presence of cleaner fish decreases both fish abundance and diversity.
B) The presence of cleaner fish increases both fish abundance and diversity.
C) The presence of cleaner fish increases fish abundance but decreases diversity.
D) The presence of cleaner fish decreases fish abundance but increases diversity.