What is the best way to revise sentences 1 and 2 to make one complex sentence?

• A. A mental squabble was happening in Chelsea's head, as she debated on whether she should ask her
sister for help.
B
A mental squabble was happening in Chelsea's head; as she debated on whether she should ask her
sister for help.
C.
A mental squabble was happening in Chelsea's head as she debated on whether she should ask her
sister for help.

D.
A mental squabble was happening in Chelsea's head, and as she debated on whether she should ask
her sister for help.