Reading the test paper in a hurry,she overlooked a problem,She ____more careful.A.ought have beenB.could have beenC.could beD.should have been

Reading the test paper in a hurry,she overlooked a problem,She ____more careful.
A.ought have been
B.could have been
C.could be
D.should have been

D 她应该更仔细些的

D.should have been