Answer:
Noise (distraction/disturbance)
Step-by-step explanation:
Noise can simply be defined as a loud or unpleasant sound to the ears. It can serve as a form of distraction or disturbance as the case maybe but ultimately it is unwanted.
In the above question, the constant ringing of the manager's phone was a distraction to the manager as he did not grasp Carla's complaint, and a disturbance for Carla as she could not explain her problem as much as she wanted.
Cheers.