Sena has chosen a series consisting of three films and a series consisting of another three films, so that she can watch a different film on each of six specific evenings. For each series, she will not watch the second film of that series before the first, and will not watch the third film of that series before the second.
In how many different orders can Sena decide to watch these six films?
A20
B24
C27
D30
E32