In a graph, what effect would adding a catalyst have on D? A. It would decrease.
B. It would increase.
C. It would stay the same.
D. You cannot tell from this graph.

C. It would stay the same

Explanation:

PLATO answer

the answer is c i believe

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.