In Answer to a Question, a Witness Stated, "The Way

In answer to a question, a witness stated, "The way the man was acting at the time appeared to be irrational." This is:

A) admissible because it is a factual description of an outward manifestation drawn from observed facts under circumstances when the witness cannot adequately describe the facts.
B) inadmissible because it is pure opinion evidence and does not come within any of the exceptions.
C) admissible only if the witness is an expert witness, but not if he or she is a non-expert witness.
D) incompetent and inadmissible, because the condition of the man could be easily described by stating pure facts.