Final answer:
The nurse should identify statement C) “I should continue taking my medication as prescribed” as an indication that the client understands the teaching.
Step-by-step explanation:
The nurse should identify statement C) “I should continue taking my medication as prescribed” as an indication that the client understands the teaching. This is because it is important for individuals with type 1 diabetes mellitus to continue taking their prescribed medication, including insulin, during illness to help maintain blood glucose levels. Skipping medication during illness can lead to complications.