HELP：一道英语词汇题5
Hormonal levels rise and fall through the day and night.Cortisol,for example,peaks 20 minutes after you wake up and 20 minutes before you sleep.Growth hormone,by contrast,increase while we are asleep,peaking an hour after we nod off.So when your m（）
A.was misinforming you
B.knew nothing about science
C.couldn’t keep you awake
D.was telling the truth