How did the Punic Wars contribute to the end of the Roman Republic?

A.
They divided the loyalties of Roman leaders, who fought to control the new territories.
B.
They created deep political rivalries that divided the Senate and paralyzed the government.
C.
They overextended the Roman military, which weakened defenses along the northern border.
D.
They resulted in territorial expansion that made the Republic wealthier but more economically unequal.