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JonShukhrat
Dear IanStewart and RonPurewal,

I would be grateful if you could help better understand the problem with choice A. The OE rules out choice A for the reason that the modifier “who defeated…” is ambiguous because it may refer to Marcus Kann or Horatio Caro or both. However, I didn’t have such problem while reading it and naturally associated the modifier with Horatio Caro because a noun modifier usually modifies what is closest (especially when there is no a noun phrase), or else the sentence would be worded accordingly to mean a different thing.

Cannot the line of reasoning OE uses for ruling out A be used for ruling out OA as well?

I agree with you that the OE takes an inconsistent view of modifiers here. I think there's only one correct way to interpret the "named after" phrase in answer E, because of the comma. If the sentence meant to say that the variations were named after Caro and Kann, the comma would need to be removed:

Among the many variations of the Caro-Kann defense named after Caro and Kann are the Advance variation and the Fantasy variation.

We then have "variations ... named after Caro and Kann". But when we insert a comma, the role of a comma used this way is to interrupt the sentence to immediately describe something in the sentence, so that description applies to whatever came just before the comma. So below it's specifically the "Caro-Kann defense" that was named for Caro and Kann:

Among the many variations of the Caro-Kann defense, named after Caro and Kann, are the Advance variation and the Fantasy variation.

If this sentence had meant to say the variations were named for Caro and Kann, it could have removed the comma as in my first example, or it could have moved the descriptive phrase:

Among the many variations, named after Caro and Kann, of the Caro-Kann defense are the Advance variation and the Fantasy variation.

Of course these rewritten sentences seem strange because it doesn't make much sense that the "Advance" and "Fantasy" variations were named for Caro or Kann.

I agree with you about the "who defeated" in answer A -- the most natural interpretation again is that it applies to what immediately precedes the interrupting comma, so it most naturally describes "Horatio Caro" alone. There's a different reason I don't like answer A here -- it talks about "the defense" as though there's some defense the sentence has previously mentioned. That's needlessly confusing when reading the sentence -- it would make more sense, if we wanted to write the sentence the way A is written, to move "The Caro-Kann defense" to the beginning: The Caro-Kann defense, named for Kann and Caro, who defeated Mieses using the defense, has spawned... and then when we first read it, we know what the sentence is talking about when it first mentions "the defense".

I don't like the OA here too much either -- I'd prefer that it replace the redundant "the defense" with "it" near the end of the underlined portion, and I don't know what the passive word "Included" is doing at the beginning of the sentence (who is "including" the variations? The word serves no purpose here) but it's the best of the five.
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Dear IanStewart

After hundreds of posts, now I am writing to you to simply say “Thank you”.
I have just received the confirmation email. I got 770.
This score wouldn’t be possible without you.
My deepest respect!
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Quote:
Named after Austrian player Marcus Kann and English player Horatio Caro, who defeated reigning champion Jacques Mieses in twenty-four moves with the defense, the Caro-Kann defense has spawned several variations, including the Advance variation and the intriguingly-named Fantasy variation.


(A) Named after Austrian player Marcus Kann and English player Horatio Caro, who defeated reigning champion Jacques Mieses in twenty-four moves with the defense, the Caro-Kann defense has spawned several variations, including

(B) The variations of the Caro-Kann defense, named after Austrian player Marcus Kann, who defeated reigning champion Jacques Mieses in twenty-four moves using the defense, and English player Horatio Caro, have spawned several alternatives, including

(C) The Caro-Kann defense, named after Austrian player Marcus Kann and English player Horatio Caro, who defeated reigning champion Jacques Mieses in twenty-four moves using the defense, has spawned several variations that include

(D) The Caro-Kann defense, named after Austrian player Marcus Kann, who defeated reigning champion Jacques Mieses in twenty-four moves using the defense, and English player Horatio Caro, and has spawned several variations that include

(E) Included among the many variations of the Caro-Kann defense, named after Austrian player Marcus Kann, who defeated reigning champion Jacques Mieses in twenty-four moves using the defense, and English player Horatio Caro, are

There is a meaning issue in choices A-D. (Additional Knowledge: "Caro-Kann defense" is a chess opening). To say that Caro-Kann defense itself has spawned variations is incorrect since the defense itself is a series of moves.
Hence, choices A-D are incorrect.
Now, looking at choice E, the sentence boils down to "Included among the many variations of Caro-Kann defense, ...., are the Advance variation and the intriguingly-named Fantasy variation." which works perfectly. Also the meaning of the sentence is "Advance variation and Fantasy variation are included among the variations of Caro-Kann defense".

Hence, the correct answer is E
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For option E, what is included among the many variations? shouldn't there be a modifier after it? E seems to be misplaced modifier. Can someone please correct me
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I am not going to write about A, B, and D since a majority of people haven't selected those choices.
My Reasoning for why C might be wrong is

(C) The Caro-Kann defense, ......................... has SPAWNED several variations that include the Advance variation and the intriguingly-named Fantasy variation.

Spawned means - to give birth physically, which can't be done by a nonliving entity.( The Caro-Kann defense)

(E) Included among the many variations of the Caro-Kann defense, named after Austrian player Marcus Kann, who defeated reigning champion Jacques Mieses in twenty-four moves using the defense, and English player Horatio Caro, are the Advance variation and the intriguingly-named Fantasy variation.

Although I feel like in ", and English player Horatio Caro", the comma shouldn't be there, because it isn't a clause. But when we read the the entire sentence without the long modifier, it makes much more sense.

Included among the many variations of the Caro-Kann defense, .............................................., are the Advance variation and the intriguingly-named Fantasy variation.

IMO E
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