When Treating a Child in Severe Diabetic Ketoacidosis, the Child

When treating a child in severe diabetic ketoacidosis, the child is placed in the intensive care unit on an insulin IV drip of what concentration?

A) 1 unit regular insulin per 1 mL of 0.9% normal saline
B) 1 unit rapid-acting insulin per 1 mL of 0.9% normal saline
C) 10 units regular insulin per 1mL of 0.9% normal saline
D) 1 unit rapid-acting insulin per 10 mL of 0.9% normal saline