Which is the best way to rewrite the sentence below?

One of the best times to see a movie is during the afternoon in the summer it is very hot outside, while the movie theaters are usually cool.
A.
One of the best times to see—a movie is during the afternoon in the summer it is very hot outside, while the movie theaters are usually cool.
B.
One of the best times to see a movie is during the afternoon in the summer. It is very hot outside, while the movie theaters are usually cool.
C.
One of the best times to see a movie is during the afternoon in the summer it is very hot. Outside, while the movie theaters are usually cool.
D.
One of the best times to see a movie; is during the afternoon in the summer it is very hot outside, while the movie theaters are usually cool.

B. One of the best times to see a movie is during the afternoon in the summer. It is very hot outside, while the movie theaters are usually cool.