我们的改革是从经济方面着手的 , 又首先是从农村开始的 .
A.
Our reform first implemented in the economic sphere, beginning with the rural areas.
B.
Our reform first implemented in the economic sphere, begun with the rural areas.
C.
Our reform was first implemented in the economic sphere, begun with the rural areas.
D.
Our reform was first implemented in the economic sphere, beginning with the rural areas.