A client is newly prescribed with metformin (Glucophage) for type 2 diabetes.Which of the following statements indicate that the client understands the teaching of metformin?

Choice A rationaleWhile metformin is commonly used as a first-line medication for type 2 diabetes, this choice does not specifically address a critical safety concern related to metformin.Choice B rationaleMetformin can interact with contrast dyes used in imaging studies, increasing the risk of acute renal failure due to lactic acidosis. Patients need to be aware of this interaction to avoid potential complications.Choice C rationaleMetformin is used to lower blood glucose levels, not increase them. This choice is incorrect.Choice D rationaleWhile metformin is associated with less weight gain compared to other diabetes medications, this choice does not address the critical interaction with contrast dye.