Read this sentence:
Ruby was worried about her impending exams, she then started setting aside some time to study.
Which option corrects this comma splice error?
ОА.
Ruby was worried about her impending exams she then started setting aside some time to study.
OB.
Ruby was worried about her impending exams and she then started setting aside some time to study.
OC. Ruby was worried about her impending exams; she then started setting aside some time to study.