大全561

561.        One pervasive theory explains the introduction of breakfast cereals in the early 1900s as a result of the growing number of automobiles, which led to a decline in horse ownership and a subsequent grain glut; by persuading people to eat what had previously been horse feed, market equilibrium was restored.

(A) by persuading people to eat what had previously been horse feed, market equilibrium was restored

(B) persuading people to eat what had previously been horse feed restored market equilibrium

(C) by persuading people to eat what had previously been horse feed, it restored market equilibrium

(D) the persuasion of people to eat what had previously been horse feed restored market equilibrium（B）

(E) market equilibrium was restored when people were persuaded to eat former horse feed

E不能选是不是就是因为主动优先原则呢？

Yes, this is one of the reasons.

Another reason is that the "when" clause in choice E does not clearly emphasize the causal relationshiop between the restore of market equilibrium and the change of the diet.

You can refer to the explanation of OG 4.

E also expresses the cause-and-effect relationship between the return of warmer weather and the rotting of the fruit; A, C, and D merely describe these events as contemporaneous.

我感觉这里还有个对称的意思在

One pervasive theory explains the introduction of breakfast cereals in the early 1900s as a result of the growing number of automobiles, which led to a decline in horse ownership and a subsequent grain glut;

persuading people to eat what had previously been horse feed restored market equilibrium

而E没有这样的效果

3x