53. According to the passage, what is one potential downside of advances in biotechnology?
(A) Increased risk of environmental and health problems.
(B) Decreased access to healthcare.
(C) Increased reliance on traditional medicine.
(D) None of the above.

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統計： A(49), B(10), C(8), D(165), E(0) #3112917

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stem cell therapies may one day be used to regenerate damaged tissues and organs.
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