An external insulin pump is prescribed for a client with diabetes mellitus. The client asks the nurse about the functioning of the pump. The nurse bases the response on the information that the pump:

A. Gives small continuous doses of regular insulin subcutaneously, and the client can self-administer a bolus with an additional dosage to coordinate with meals: The insulin pump delivers a basal dose of regular insulin continuously and allows the client to administer bolus doses of insulin during meals to manage blood glucose levels. B. It is surgically attached to the pancreas and infuses with regular insulin into the pancreas, which in turn releases insulin into the bloodstream: The insulin pump is not surgically attached to the pancreas. It delivers insulin subcutaneously, not directly into the pancreas. C. Is time-released programmed doses of regular or NPH insulin into the bloodstream at specific intervals: The pump delivers continuous regular insulin, not NPH. NPH insulin is not used in insulin pumps due to its longer action. D. Continuously infuses small amounts of NPH insulin into the bloodstream while regularly monitoring blood glucose levels: NPH insulin is not used in insulin pumps due to its variable absorption rate. The pump typically uses regular insulin or rapid-acting insulins. Blood glucose is monitored separately, often by the client or with a continuous glucose monitor.