The nurse is teaching a client with Parkinson's disease about dietary considerations. The nurse understands that this client is at highest risk for:

Choice A rationale: An allergy to sulfa drugs is important as some diabetes medications, like sulfonylureas, contain components related to sulfa drugs, which could cause an allergic reaction in susceptible individuals.

Choice B rationale: Smoking cessation and lifestyle history are important but might not directly impact initial diabetes treatment options.

Choice C rationale: Numbness in the soles of the feet might indicate neuropathy, a common complication of diabetes, but is not directly related to the choice of initial treatment.

Choice D rationale: While obesity is a risk factor for Type 2 diabetes, it's less critical for immediate treatment decisions compared to drug allergies that could impact medication choices.

Choice A rationale: Elevated T3 and T4 with low TSH levels are indicative of hyperthyroidism, not a side effect of radioactive iodine treatment.

Choice B rationale: One of the expected side effects of RAI treatment for hyperthyroidism is permanent hypothyroidism (or underactive thyroid, when the thyroid does not produce enough hormones). Elevated TSH levels with low T3 and T4 are indicative of hypothyroidism.

Choice C rationale: Low TSH, T3, and T4 levels are not typical outcomes of radioactive iodine treatment; typically, the treatment leads to a decrease in T3 and T4 with increased TSH levels.

Choice D rationale: Elevated TSH and low T3 is major side effect of radioactive iodine treatment for hyperthyroidism. However, it does not cause elevated T4 levels.