When a person is said to add to the chaotic atmosphere of a place, then it simply means that his behavior and actions increase the chaos in a place.
Chaos
This is referred to as a state of disorder and disquiet which is loud, rowdy and raucous. Effectively, what this means is there is the absence of order.
With this in mind, we can see that if Anthony adds to the disquiet, that means he makes loud noises or continues to it and the most likely answer is option A.
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