For the next school year, you must take math, English, science, and one elective. You must take all four classes in one day. How many class schedules are possible?
A. 4
B. 10
C. 12
D. 24
4•3•2•1=24 4 ways to fill the spot for first class 3 ways to fill the spot for second class 2 ways to fill the spot for 3rd class 1 way to fill the spot for 4th class
