What is the correct way to rewrite this sentence?

He missed the beginning of the movie, he could not follow the plot.

Question

What is the correct way to rewrite this sentence?
 
 He missed the beginning of the movie, he could not follow the plot.

anonymous · Answer

Because he missed the beginning of the movie, he could not follow the plot. 

He missed the beginning of the movie; because he could not follow the plot.

Becuase, he missed the beginning of the movie he could not follow the plot.

Because he missed the beginning of the movie he could not follow the plot.

anonymous · Answer

Well I'll give you a hint. It's not B or C.

anonymous · Answer

i want to say A