The error in this case is primarily built into the phrase
that sported the delicacies, the cocktails and the performances. Let us be clear that it is t
he parties that sported the three things and nothing else. Then the mystery will unravel.
Let us go choice by choice.
A. The pronoun
that stands for the courts. It is not the courts that sported the events but the parties. Secondly, who were the flamboyant sybarites?
They should be some people and not the later generations.
B. The antecedence of the pronoun
they in the second part of the sentence seems unclear. Is
they replacing the kings or the courts or the distantly placed parties?
D. Says that
their courts sported the events - wrong.
E. Says that
their courts sported- again wrong.
This leaves us with choice C, which correctly points to
the parties that sported the events. And hence the correct choice.
(P.S.) This question is my own creation and hence there is no other official answer
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