None of them.
He is stalling for time (especially if he is saying little except hemming and hawing)
Perhaps "hedging" or 'evasive' if he is speaking without saying anything definite, but this usually means he is not going to give any kind of straight answer.
Perhaps 'dodge the question'.
The same meaning, but in terms of not getting on and taking action, would be 'pussyfooting around'.
Student or Learner