GWD28-41 没有讨论过。。。。

During theeighteenth century, widespread changes in agriculture, known as the agrarian revolution,involving the large-scale introduction of enclosed fields, of new farmingtechniques and crops, and the substitution of commercial for subsistencefarming.

A.   revolution, involving the large-scaleintroduction of enclosed fields, of new farming techniques and crops, and

B.   revolution, involved the large-scaleintroduction of enclosed fields and of new farming techniques and crops, and

C.   revolution, which involved the large-scaleintroduction of enclosed fields and of new farming techniques and crops, and

D.   revolution involved the large-scaleintroduction of enclosed fields, new farming techniques and crops, and of

E.    revolution that involved the large-scaleintroduction of enclosed fields and new farming techniques and crops, and of