单项选择题

急性肝炎时,人体内转氨酶变化为()

A.ALT升高,AST升高,且ALT=AST
B.ALT升高,AST升高,且ALT>AST
C.ALT升高,AST正常
D.ALT正常,AST升高
E.ALT升高,AST升高,且ALT