Select the Answer That Corrects the Comma Splice or Run-On

Select the answer that corrects the comma splice or run-on sentence.
-Jeff left Annette at the altar her mother vowed to get revenge.

A) Jeff left Annette at the altar, her mother vowed to get revenge.
B) Jeff left Annette at the altar; then her mother vowed to get revenge.
C) Jeff left Annette at the altar, then her mother vowed to get revenge.
D) Jeff left Annette at the altar, then, her mother vowed to get revenge.