Choose the correct passive voice transformation of the sentence: He claimed to have seen a rare species of bird during his expedition to the Amazon rainforest.
A.A rare species of bird was claimed to have been seen by him during his expedition to the Amazon rainforest.✓ Correct
B.A rare species of bird was seen by him during his expedition, it was claimed.
C.He claimed that a rare species of bird was seen by him during his expedition.
D.It was claimed by him that he had seen a rare species of bird during his expedition to the Amazon rainforest.
Explanation
The correct passive form retains the infinitive perfect structure: 'A rare species of bird was claimed to have been seen by him during his expedition to the Amazon rainforest.'
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