45.
Your Answer is
Correct Answer is C
Explanation
Exclude A, because the Nature Conservancy asserts at the end of the underlined part and the Nature Conservancy stresses at the beginning of the sentence are semantically repeated;
Exclude B, because that were not restored for humans' business interests or recreation is the same as the previous not human interest semantic repetition;
Exclude D, because if all the underlined parts are deleted, the previous these refer to unknown.