The correct answer is D. She is able to calmly discuss issues with her peer.
Step-by-step explanation:
A healthy relationship involves positive interactions and communication, this implies when two individuals have a healthy relationship they support and respect each other, discuss and solve conflicts calmly, avoid interfering in the personal space of the other person and act to promote the welfare of both. This implies the characteristic that shows Joni has a healthy relationship is "She is able to calmly discuss issues with her peer" because this shows they respect each other and also they can solve conflicts calmly to avoid hurting the other or ending the relationship.