<span>A. 8,648,640
B. 13
C. 665,280
D. 4,324,320
</span>Assume you don't watch movies twice.
If you have 13 movies to pick from, then you have 13 choices for the first movie. Then, only 12 choices are left. Do this until only 6 are left (13-7=6)
This equates to

Therefore, the answer is A, 8,648,640 different ways.
Hope this helps!
I think Its C because in the frequency table or table given if the heads are counted there are 6 of them and over all 10 which will make 6/10