下列选项中，其中与痫病病情轻重无关的是（）

A.痰浊的浅深

B.起病的急缓

C.正气的盛衰

D.发作间隔时间的久暂

E.病发持续时间的长短

Recent studies have shown that most US graduates receive cash as gifts, though the amount

received ______ from person to person. [ ]

A. prefers      

B. promotes      

C. varies        

D. suffers