做对了，就成高手？？

nettalker

The following comments come from an American guy, who scored 800 in GMAT several weeks ago, with only one week preparation.

1.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
(e) market equilibrium was restored when people were persuaded to eat
former horse feed



B.

A is wrong because there is no subject.

C is wrong because "it" has no antecedent - what does it refer to?

D is just awkward.  "The persuasion of people" is hen mafan.

E is wrong because "former horse feed" should be something that
literally used to be horse feed - not something that would have been
used as horse feed.

B works - "persuading people to eat..." is the subject.  "what had
previously been horse feed" is less direct so it can mean something that
previously would have been horse feed but is not now.