Amos is on trial for the ambush shooting his neighbor Mr. Pence. The prosecution calls Mrs. Pence to the stand to testify that the day before her husband was killed, her husband described to her a chance meeting he had with Amos on the street. Mr. Pence told his wife that Amos was mad at him for playing his drums and said, "If you keep playing those damn drums, one of these days I'm going to blow your head off." Mrs. Pence's testimony concerning her husband's statement is:

a. Admissible, to show Amos's state of mind.

b. Admissible, because Amos's statement is that of a party-opponent

c. Inadmissible, because it is improper evidence of a prior bad act. d. Inadmissible, because it is hearsay not within any exception.

**please explain why the answer is correct and why the other answers are incorrect**