Which sentence from the passage most strongly supports the answer to Question 7?

Answer choices for the above question

A. “This light is called Cherenkov radiation, and it’s seen in the distinctive blue glow of nuclear reactor cores.”

B. “And thus, we arrive at our answer: Centuries from now, deep in concrete vaults, the light from our most toxic waste will still be shining.”

C. “When radioactive particles travel through materials like water or glass, they can emit light through a sort of optical sonic boom.”

D. “Watch dials, however, are not our only radioactive light source.

The correct answer is C. “When radioactive particles travel through materials like water or glass, they can emit light through a sort of optical sonic boom.” This sentence directly explains how radioactive particles can emit light, which supports the answer to question 7.