Alberto Was Attending a Concert at Parker Hall

Alberto was attending a concert at Parker Hall. During the concert Alberto had leave his seat to go to the washroom. There was some construction going on in the hallway outside the washroom, and Alberto tripped on a loose tile, injuring himself. Because it was fairly dark, he didn't see the sign warning patrons to watch their step. Alberto sues Parker Hall for negligence. Which of the following is TRUE?

A) The defendants complied with the standard of care by warning patrons of the danger.
B) Alberto voluntarily assumed the risk of an accident by going to the bathroom in the dark.
C) The premises were not reasonably in safe in the circumstances.
D) The defendants did not take reasonable care to make the premises safe
E) Both C and D.