A pharmacist explains to a doctor that two medications he has prescribed interact negatively. The doctor listens, summarizes what the pharmacist has said, and asks for a suggestion of another drug to prescribe. The pharmacist makes a recommendation that works for the patient. Which aspect of this interaction is characteristic of active listening?

The pharmacist explained something to the doctor.

The doctor summarized what was said and asked a follow-up question.

The pharmacist made a recommendation.

The recommendation worked.