Which of the following is an appropriate treatment for low blood sugar?

The appropriate treatment for low blood sugar is the administration of fast-acting carbohydrates, as they quickly restore glucose levels in the bloodstream. In this context, 15mg of fast-acting carbohydrates is considered an effective response because it can provide immediate relief from hypoglycemic symptoms by rapidly increasing blood glucose levels.

Fast-acting carbohydrates include options such as glucose tablets, fruit juice, or regular soda, which can be rapidly absorbed by the body. This is crucial in situations where someone is experiencing low blood sugar, as timely intervention is necessary to prevent more severe symptoms or complications.

In contrast, other options like insulin are inappropriate for treating low blood sugar because insulin lowers blood sugar levels, potentially worsening the situation. A high-protein snack or slow-acting carbohydrates would not address the immediate need for quick glucose replenishment, as they take longer to digest and increase blood sugar levels. Therefore, the correct choice focuses on the need for a rapid response to hypoglycemia.