单项选择题

急性肝炎时,血中转氨酶一般变化情况为()

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