Answer:
A. Admissible for impeachment purposes only.
Step-by-step explanation:
A testimony can be admissible for impeachment when the defendent speak things contrary or inconsistent with the trial testimony
The spouses friend that was called to serve as defendent spoke in contrary to what he was expected to say he was to say they lady was driving and wasnt under any alcohol influence but he said they both changed seat this wasn't consistent with the trial testimony and this made the testimony impeached because of the inconsistency with what the woman's husband was saying.