“But, soft! what light through yonder window breaks?”

“Soft” here means “wait” or “hold on,” and “what light through yonder window breaks” asks what light is appearing through that window over there. Choice B, “Wait—what’s that light in the window?”, captures both the pause and the question about the light. Choice A is less accurate because it leaves out the specific image of light in a window.

AI-written and checked against the verified answer.