D the doctor need not comply with the patient
If a blood blister keeps getting bigger, the most likely 'treatment' a doctor would do is burst the blister. However, there may be other treatments involved in which you would actually have to ask and clarify with a doctor.
A would be the answer as far as I know
The wire brush used for cleaning the oven may likely to leave the wire particles which may contaminate the pizza. The wire particles will remain undigested in the food and if sharp enough will peirce the organs of the digestive system.