GMAT Sentence Correction (SC) | Re: The king's guests had had plenty of time to glut themselves...

Hi Experts,

I understand why correct answer is correct as explained in above replies. However, 'they' in choice A cannot logically refer to rebels, or can it?

'The king's guests had had plenty of time to glut themselves at the feast by the time the rebels broke into the castle, and thus rebels were too stupefied, drunk, and startled to react effectively' doesn't make sense.

Please help me understand why choice A is ambiguous if meaning is also important?

Thanks

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