The sentence that contains a dangling modifier is C) Looking through the window, the room seemed very large.
It is dangling because we don't know who the participial phrase <em>looking through the window </em>refers to. It certainly doesn't refer to the room, the room wasn't looking through the window.
Walt Whitman's intense patriotism caused him to volunteer in hospitals
<u><em>Your answer should be the choice</em></u><u><em> "B".</em></u>
