An external insulin pump is prescribed for a client with diabetes mellitus. When the client asks the nurse about the functioning of the pump, the nurse bases the response on which information about the pump?

A It is timed to release programmed doses of either short-duration or NPH insulin into the bloodstream at specific intervals. D It administers a small continuous dose of short-duration insulin subcutaneously. The client can self-administer an additional bolus dose from the pump before each meal. B It continuously infuses small amounts of NPH insulin into the bloodstream while regularly monitoring blood glucose levels. C It is surgically attached to the pancreas and infuses regular insulin into the pancreas. This releases insulin into the bloodstream.