Informed consent and disclosing necessary information is a right that all patients have. They have the right to ask what they are receiving and the treatments they are undergoing. Now, when situations arise where information such as where antibodies come from, it might be appropriate to provide a vague but informative response to the client. However, still in the basis of truth, just that to protect the client from unnecessary anxiety it might be best to provide a slight vague but honest reply.
The answer to this would be D: eats mostly or only foods that are plant-based. this would be because all the others are false, vegetarians can get all the essentials from plants and nuts and stuff, they just don't eat meats. -hope this helps :3