The tradition of hanging or wearing the willow in the Qingming Festival comes from the sayings except _____.
A.
the willow tree Jie Zitui sat against when he was burnt death revived the next year.
B.
the willow branches could drive away the ghost according to the Buddhism.
C.
t he willow branches on the door can cool the room.
D.
hanging the willow branches on the door is to commemorate Shennong.