Read the sentences from Barrio Boy by Ernesto Galarza. Suspecting something, he added: "When you are finished, don't forget to pull the chain. See. That's what the sign says." And, to be sure, there was a paper with writing tacked to the wall, next to an aluminum up-and-down pipe.

The hotel clerk most likely suspects that Ernesto and his mother
A. do not notice the sign on the wall.
B. have to go to the bathroom right away.
C. do not understand what the sign says.
D. think flushing a toilet is a waste of water.