Please help, I think the answer is B but I'm not sure Question: William has noticed that most plants are green. He wants to know why.
Which of the following is a testable question that William could ask about the color of plants?

A.
Why aren't animals green?
B.
What part of a plant cell gives plants their green color?
C.
What would plants look like if they were not green?
D.
Why aren't most plants orange?'