Events that occur during a prolonged fast include: (select all that apply)

A. During prolonged fast, initially, glycogen is used, then fat would be metabolized to ketone body and later muscle protein would be degraded.
B. Initially fat would be metabolized via the citric acid cycle and carbohydrate would be used to replenish citric acid cycle intermediate.
C. During prolonged fast, muscle proteins are broken down first to supply alanine for gluconeogenesis (glucose alanine cycle) and later on fats are broken down. That is why it is difficult to lose weight as fats are difficult to burn initially.
D. Initially fat would be metabolized to ketone body and then muscle protein would be degraded.
E. When carbohydrate stores are depleted, muscle protein would be degraded to amino acids and later the body adapts to ketone body utilization that arises from low levels of citric acid intermediates.