Which of the Following Events Ended MRTA's Influence

Which of the following events ended MRTA's influence?

A) The capture of Abimael Guzman on September 12, 1992 along with eight others and his computer that contained their membership roster, organizational structure and weapons caches.
B) Three of their members were killed when a bomb they were assembling exploded on March 6, 1970.
C) On April 22, 1997, government antiterrorism experts launched an attack on a residence taken captive by them. Using sophisticated listening devices to track the captor's presence, 140 troops, utilizing five tunnels dug under the residence, surprised and killed all of the captors, with one hostage dying in the attack.
D) The President of Columbia aggressively went after them using the support from Plan Columbia.