Evidence has been accumulating since the 1930s that reducing an animals energy intake below its energy expenditure extends the life span and delays the (i)_____ of age-related diseases in rats, dogs, fish, and monkeys. Such results have inspired thousands of people to (ii)_____ in the hope of living longer, healthier lives. They have also led to a search for drugs that (iii)_____ the effects of calorie restriction without the pain of actually going on a diet.
答案：B,E,H