Sonya sets up an irrevocable trust for her grandchild, Roger. When he turns 25, Roger is to receive $500,000. Roger, however, starts a successful app company in his early 20s, and by the time he is 25, he is worth $25 million. Roger would prefer that the trust money go to a charitable cause and says that he doesn't need it. Which of the following statements is true? An irrevocable trust cannot be changed. Roger will inherit the money. Roger, on his own, can revoke the trust. Sonya, on her own, can revoke the trust. If Roger and Sonya agree, the trust can be revoked