请选择CBA/t,F7s;~5x,e8^6y Sarah is going to her room tomorrow morning.)[(S1t/P)P*L*C.x:g6r-~9f
A. clean)[(S1t/P)P*L*C.x:g6r-~9f
B. cleans)[(S1t/P)P*L*C.x:g6r-~9f
C. cleaning)[(S1t/P)P*L*C.x:g6r-~9f