Which intervention is most important for the nurse to implement for a client with type 2 diabetes mellitus (DM) who is receiving insulin lispro?

A. Check blood glucose levels every six hours: Insulin lispro is rapid-acting and works within minutes, so glucose monitoring should be more frequent and timed around meals. Every-six-hour checks with lispro would miss critical post-dose fluctuations. B. Provide meals at the same time this insulin is given: Insulin lispro has a rapid onset of about 15 minutes, so food should be available immediately after administration to prevent hypoglycemia. Coordinating meals with dosing ensures glucose from food is available as the insulin begins to act, maintaining safe blood glucose levels. C. Keep an oral liquid or glucose source available: Having a quick sugar source on hand is always advisable for clients on insulin, but it is a general precaution. Timing meals with the dose is more crucial to prevent the initial, predictable hypoglycemic risk that follows lispro administration. D. Assess for hypoglycemia between meals: While monitoring for hypoglycemia is important, hypoglycemia from lispro occurs shortly after administration if meals are delayed. Between-meal checks are secondary to ensuring proper timing of food and insulin administration.