Which Statement Is the Correct Interpretation of the Graph

Which statement is the correct interpretation of the graph?

A) The population of Didinium goes extinct with the addition of Paramecium on day 4.
B) The population of Didinium continues to increase and remains high even after the extinction of the Paramecium.
C) The population of Paramecium goes extinct with the addition of Didinium on day 8.
D) The population of Didinium increased but then went extinct after the population of Paramecium went extinct.
E) The population of Didinium is able to increase at the expense of the Paramecium population. After a brief period both populations are able to coexist.