Final Answer:
The organisers believed the show to have been triumphant.
Thus the correct option is (C).
Step-by-step explanation:
Option C aligns most accurately with the original statement, expressing the organizers' belief in the triumph of the show. It retains the essence of the original sentence without introducing unnecessary complexity. The term "triumphant" captures the organizers' sense of success and accomplishment, maintaining clarity and conciseness.
In communication, maintaining fidelity to the original meaning is crucial. Option C achieves this by conveying the organizers' perspective on the show's success without introducing ambiguity or altering the tone.
The word "triumphant" encapsulates a sense of victory and achievement, reflecting positively on the organizers' perception of the event.
Thus the correct option is (C).