Can the Defense Introduce Evidence That Fred Has Previously Attempted

Can the defense introduce evidence that Fred has previously attempted to intervene in fights on behalf of the victim

A) Yes, the defense can introduce evidence of prior acts that are relevant to the issues in this case.
B) Yes, this can be admitted as character evidence.
C) No, the defense can introduce character evidence only if the prosecution called character witnesses.
D) No, the defense can only introduce evidence directly related to the issue of whether Fred committed the crime charged.