商鞅变法和北魏孝文帝改革在本质上的共同作用是  [ ]

A、促使井田制的瓦解和均田制的推行

B、使秦国和北魏实力强大

C、推动了封建化的历史进程

D、解决了土地兼并的问题

-----Have you got any particular plans for the coming holiday?

----- Yes, _______, I’m going to visit some homes for the old in the city.

A．If ever

B．If busy

C．If anything

D．If possible