Critical Reasoning (CR) | Re: One test to determine whether a person has been infected with tubercul

We're trying to find an assumption that backs up the followingclaim:

If a patient is injected with the tuberculosis protein AND that patient experiences a skin irritation at the injection site THEN they must have tuberculosis.

(A) All of the proteins present in disease-causing bacteria can be recognized by the body’s immune system.No mention of the skin irritation

(B) Localized skin irritations are a characteristic symptom of tuberculosis in most people. Vague mention of skin irritations and its effect on most people. This choice does not mention the tuberculosis protein being the root of the irritation but could be an irritation caused by anything.
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