Read this sentence, which contains a comma splice.
My cousin got the lead role in the play, he’s so excited!
Which of the following makes this sentence correct?

A) My cousin got the lead role in the play. He’s so excited!

B) My cousin got the lead role in the play: and he’s so excited!

C) My cousin got the lead role in the play he’s so excited!

D) My cousin, got the lead role in the play he’s so excited!