求助一道数学题

Kim, Megan, Nina, Paula are planning to go to a movie theater, where three different movies-A, B, and C-are being shown simultaneously in different auditoriums. Each of them will see only one of the movies but not necessarily the same movie as any of the other three people. One possible outcome is that Kim and Megan will see C while Nina and Paula will see A. How many possible outcomes are there?
A. 12
B. 27
C. 48
D. 64
E. 81
答案有的是B. 27或E. 81. 我自己算是81. 非常让人迷惑。