39. What is the best title for this passage?
(A) The Medical Miracles of CRISPR-Cas9
(B) Invasive Species: A Global Ecological Crisis
(C) Gene Drives: Conservation Savior or Ecological Threat?
(D) The Extinction of Island Bird Populations
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統計: A(1), B(0), C(4), D(0), E(0) #3979370
統計: A(1), B(0), C(4), D(0), E(0) #3979370