I wanted to know _________, but no one would like to tell me.

A．what did the old man say

B．how did the old man come

C．whether the old man would come

D．who the old man went

已知2SO₂+O₂2SO₃;△H＝-92.6 kJ·mol^-1，当反应达到平衡时，下列措施：①降低温度；②减小压强；③用V₂O₅作催化剂；④增大O₂的浓度；⑤增大SO₂的浓度；⑥恒压通入He气，能提高SO₂转化率的是

A．①②⑥

B．①④⑤

C．④⑤⑥

D．①④