OFFICIAL EXPLANATIONProject SC Butler: Sentence Correction (SC1)
For SC butler Questions Click HereQuote:
Had the United States allowed the California Republic to remain independent after the Bear Flag Revolt rather than annexing it with military force, this "California nation" might have become the wealthiest nation in North America.
A) Had the United States allowed the California Republic to remain independent after the Bear Flag Revolt rather than annexing it with military force, this "California nation" might have become
B)
With the United States annexing the California Republic after the Bear Flag Revolt instead of allowing it to remain independent, this "California nation" did not become
C) The United States annexed the California Republic after the Bear Flag Revolt and did not allow it to remain independent, to prevent it
to becomeD) The United States did not allow the California Republic to remain independent after the Bear Flag Revolt,
it annexed
it with military force instead, and this "California nation" did not become
E) The
United States, by not allowing the California Republic to remain independent after the Bear Flag Revolt and, instead, by annexing
it,
it prevented this "California nation" from becoming
MAGOOSH Official Explanation
Choice (A) follows the pattern of the idiom
Had A done X rather than doing Y, in which the first verb ("Had … allowed") is in the subjunctive and the second ("annexing") as a gerund, and the independent clause after the comma is in the subjunctive. This is quite promising.
Choice (B) uses the preposition "with" as a quasi-subordinate conjunction, with the construction "with" [noun][participial phrase].
The GMAT considers this incorrect 100% of the time.
Also, the independent clause after the comma is in the indicative mood, giving the mistaken impression that the "California nation" actually existed.
(B) is not correct.
Choice (C), up to the comma, is promising—a factual statement of what the US did and didn't do, and the infinitive of purpose in the second half is fine, but unfortunately, this choices makes an idiom mistake.
The idiom with "to prevent" is "to prevent A from doing X", NOT "to prevent A to do X."
Because of this idiom mistake, (C) is not correct.
Choice (D) is an example of false parallelism, putting the three verbs of the sentence into the grammatical relationship of parallelism without considering their logical connection.
Everything is in the indicative, so the hypothetical nature of the "California nation" is lost.
Perhaps most significantly, this makes a major pronoun mistake: "it annexed it"—a repeated pronoun for
two different antecedents.
[Once a pronoun such as
it is "assigned" to a noun, that
particular pronoun cannot stand in for a different noun. Note, however, that in one official question, the pronoun
they refers to one group and
their refers to another group. In that official sentence, the antecedent of each pronoun is clear
and the two pronouns are not identical types.]
(D) is not correct.
Choice (E) has makes the double subject mistake: "The
US [long modifier]
it prevented …"
Either "the US" or "it" has to be the subject of "prevented": both cannot be the subject simultaneously.
Also, [" … annexing it, it prevented …"? No. This choice makes the same kind of repeated pronoun mistake found in (D).
(E) is not correct.
The only possible answer is (A).
MY NOTESTAKEAWAY: → Had X done Y is a conditional.Let's shorten and rephrase (A) slightly:
Had the United States allowed the California Republic to remain independent . . . , [then] this "California Republic" might have become . . . [very wealthy].This sentence is a conditional. Watch:
• Had the United States allowed the California Republic to remain independent = IF the United States had allowed the California Republic to remain independent.
Notice that that in the "HAD" construction,
the subject and verb are inverted and the IF is dropped.Notice also that the main (result) clause precedes the IF (condition) clause.
Usually the setup is the other way around: If X had happened, [then] Y might have happened.
When you see inversion in conditional sentences, the word IF is often merely implied.
• In this conditional sentence, the time is the past and the situation is counter-factual (hypothetical).
I highly encourage you to try an SC question I posted (one of my favorite among non-official questions),
here, and to read my analysis and explanation on that same thread in this post,
here.
COMMENTSkungfury42 , you asked
Quote:
n option (A) is the usage of word "annexing" consistent with "allowed to remain"? Wouldn't "annex" be more appropriate here? [/quote]
I admire your curiosity and your eagerness to learn.
Short answer: No. This one is idiomatic. (And grammatical.)
You can read about the idiomatic construction in Mike McGarry's blog post,
here, in which this very question is discussed. (I cannot find that blog post elsewhere.)
This issue is labyrinthine.
This page, here might help to give you a sense of how complicated the issue can be.
The verb is actually [i]had allowed, not just
allowed. Please see my notes above.
Although 99 percent of the time you all should
avoid dictionary usage notes (which often do not reflect formal writing standards, never mind GMAC standards), this one excerpt from a dictionary might help. Go to
this page..
In certain instances, "rather than"
must be followed by a gerund ("annexing") and cannot be followed by the bare form of the verb ("annex").
One such instance occurs when the main verb is in the past tense, though that rule is not ironclad.
Had allowed (past perfect) controls, not the infinitive phrase that follows.
Let's take a look.
→ If the U.S. had allowed the CR to become independent rather than . . . the U.S. had annexed? Ouch.
→ If the U.S. had allowed the CR to become independent rather than annexing it . . . . Better.
→ If the U.S. had allowed the CR to become independent rather than annex it . . . / No. The past tense verb makes that "annex" sound bizarre.
(Remember, there is no implied "to annex" here, such that the bare form would be part of ellipsis. More on that issue in a moment.)
On the other hand, because the sentence is inverted, we can try out your idea and see whether inversion makes a difference:
→ Had the U.S. allowed the CR to become independent rather than annex it . . . /

I don't think so. (Again, "annex" does not equal shorthand for "to annex" because we are absolutely not eliding the verb "had allowed." There are two separate events and "allowed" does not connect them.
In fact, we need to signal that we are NOT "picking up," via ellipsis, "to become" and shortening its counterpart from "to annex" to simply "annex."
If
rather than is acting as "instead of" would (a preposition), then
rather than should be followed by a gerund (or noun).
This sentence is fine:
Had the U.S. allowed the CR to become independent instead of annexing it, . . . .
This sentence is not fine:
Had the U.S. allowed the CR to become independent instead of annex it, . . .
Rather than serves the same function as
instead of in this case, and thus should be followed by a gerund (annexing).
Finally, when
rather than serves as a preposition, the verbs will not be parallel. (I am trying hard to concoct a counterexample. I cannot do so.)
Good for you for being curious!
You had no idea that you were headed into a quagmire. Or perhaps you did.
In either event, I hope that I helped a bit.
Stay safe, everyone.
My thoughts are with the Ukrainians.