Analyze Figure 15

Analyze Figure 15.16 In the text . Which of the following is an accurate statement regarding these data and the conclusions drawn from it?

A) Dopamine levels increased in rats when, after pressing a lever, they self-administered cocaine.
B) Rats that did not receive a dopamine infusion pressed a lever 3 times or more to self-administer cocaine.
C) Rats that were trained to self-administer cocaine by pressing a lever were not influenced by dopamine infusion.
D) Rats that were trained to self-administer cocaine by pressing a lever responded to dopamine infusion by pressing the lever.
E) None of the above are accurate statements.