A client diagnosed with diabetes mellitus is instructed by the health care provider to obtain glucagon for emergency home use. The client asks a home care nurse about the purpose of the medication. What is the nurse's best response to the client's question?

A、 "it will boost the cells in your pancreas if you have insufficient insulin"
B、 "it will help to promote insulin absorption when your glucose levels are high"
C、 "it is for the times when your blood glucose is too low from too much insulin"
D、 "it will help to prevent lipoatrophy from the multiple insulin injections over the years"