Which sentence contains an error in word usage?
A) Emily won't drink coffee unless it has almost half a cup of sugar poured into it.
B) We poured over all the ancient books found in the dusty, abandoned library closet.
C) The rain came pouring down putting a very quick end to our hike to see the waterfall.
D) Evan's eyes were red this morning because he had pored over his books all night studying for his test.
