Identify a strategy the scientists might use to resolve the problem below:

Luciferase is the name of the category of enzymes that allow living creatures, such as fireflies, to emit light. Scientists believe that oxygen is needed to activate luciferase, but they find this difficult to test because when they deprive fireflies of oxygen, the fireflies die and the luciferase does not light.

A
Scientists might try breeding fireflies in an oxygen-free environment.
B
Scientists might try to genetically engineer other animals so that they can emit light without using luciferase.
C
Scientists might buy vast numbers of extra fireflies to replace any who died during the experimentation.
D
Scientists might try to engineer luciferase into organisms that do not need oxygen to survive.
E
Scientists might try to isolate luciferase in an oxygen-rich environment to see if it glows without fireflies.

oa is D