To bring to an end the 1984 Olympics, the festivities were highlighted by the arrival of an “alien” spaceship that hovered mysteriously over the Coliseum, to the amazement and delight of thousands of spectators.
A. To bring to an end the 1984 Olympics, the festivities were highlighted --
The arrival of the alien spaceship was incidental to the end of the festivities but not intentional. The infinitive 'to bring' has no relevance. B. The festivities to bring to an end the 1984 Olympics were highlighted --
Same problem as in A. C. With the festivities that ended the 1984 Olympics highlighted--
This choice is a fragment; there is no verb anywhere in the text. D. Festive highlights brought an end to the 1984 Olympics --T
he passive non-underlined part does not sync with the active verb 'brought"E. The festive conclusion of the 1984 Olympics was highlighted---
I will go with this choice as the passive 'was highlighted' gels with the passive 'by the arrival"