og 16 sc 24 求教

冬天太长

The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting.
(A) but supplementing
(B) and had supplemented
(C) and even though they supplemented
(D) although they supplemented
(E) but with supplementing

这题答案D 但是对A选项OG的解释说是fails to support the intended meaning of the sentence不太理解，
为什么这么说呢？感受不出A和D之间句子意思有什么区别
求牛牛指点～

Jagabee

A 强调的重点在后半句, D强调重点在前半句.

A还有个严重问题：but是连词，但是前后连接的成分并不对等，后半部分既没有主语也没有谓语。