After teaching a group of students about the various methods for the delivery of insulin, the instructor determines that the teaching was successful when the students identify which method as most commonly used for administration?

Subcutaneous injection

Explanation:

Insulin is a hormone secreted by the pancreas that is essential for life. People with diabetes need to administer insulin from the onset of the disease.

As for the injection mode, for the correct absorption of insulin, it must be injected into the subcutaneous tissue and not into the muscle or dermis.