The Two Mendicant Orders (Dominicans and Franciscans) That Had Helped

The two mendicant orders (Dominicans and Franciscans) that had helped the Church reform itself and combat heresy began to lose effectiveness because

A) both had become very wealthy.
B) both orders had split apart.
C) of rivalries between the Conventual Franciscans and Spiritual Dominicans.
D) mendicant orders began to undermine papal authority.
E) many prospective mendicants became Beguines or Beghars during the fourteenth century.