What Is the Role of Insulin in Weight Gain

What is the role of insulin in weight gain?

A) Eating high-glycemic index foods increases insulin levels and body weight.
B) Insulin elevates the blood glucose level and causes weight gain.
C) Insulin helps prevent weight gain in healthy, normal-weight people who eat a reasonable diet.
D) Insulin assists with the storage of body fat and weight gain in healthy people, even if calories do not exceed energy needs.
E) Insulin regulates glucose metabolism and helps in the distribution of energy and weight gain.