Damson was charged with murder, and Wagner testified for the prosecution. On crossexamination of Wagner, Damson seeks to elicit an admission that Wagner was also charged with the same murder and that the prosecutor told her, "If you testify against Damson, we will drop the charges against you after the conclusion of Damson's trial." The evidence about the prosecutor's promise is 
admissible, as proper impeachment of Wagner.  admissible, as an admission by an agent of a party-opponent.  inadmissible, because the law encourages plea-bargaining.  inadmissible, because the evidence is hearsay not within any exception. 