I ' m going to take a nap now . Also , just on a random aside , Buena Vista Social Club was like , the most boring documentary ever . The only cool thing was the street scenes of Cuba , and the interviews with Ibrahim Ferrer .
What may be the reason for them taking a nap ?
Pick the best answer from the following options:
A. They are sick .
B. They 're tired .
C. They slept too much the night before .
D. They are depressed .


B