HELP! - Mia and her friends are planning a trip to the movies. They can go to the movies on Friday, Saturday, or Sunday, and there are 10 different movies at the theater. Which expression represents the number of different combinations of day and movie Mia and her friends can choose?
A: 3+10
B: 3x10
C: 3(10+10+10)
D: 10x10x10