PLEASE HELP! HURRY!

A "testable" question is one that .

A.) will be asked on a test
B.) has no possible answer
C.) should be tested before it is asked
D.) can be answered by doing experiments

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d