As Shown in the Following Graph,selected Intertidal Communities Along the Washington

Multiple Choice

As shown in the following graph,selected intertidal communities along the Washington coast changed when the sea star Pisaster ochraceus was removed.After 10 years,how did those communities compare to control communities?

A) The communities were statistically indistinguishable from one another.
B) Without sea stars, the total number of species declined.
C) Other predatory sea stars replaced Pisaster.
D) Some populations declined, but species diversity was unaffected.