Is it C?
A huge flying reptile that died out with the dinosaurs some 65 million years ago, the Quetzalcoatlus had a wingspan of 36 feet, believed to be the largest flying creature the world has ever seen.
(A) believed to be
(B) and that is believed to be
(C) and it is believed to have been
(D) which was, it is believed,
(E) which is believed to be
(A) believed to be- what is believed to be?the Quetzalcoatlus, wingspan or 36 feet
(B) and that is believed to be - present tense is used. Quetzalcoatlus existed in the past
(C) and it is believed to have been - correct
(D) which was, it is believed, - wrong usage
(E) which is believed to be - present tense is used. Quetzalcoatlus existed in the past
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