问题详情

We can infer from Paragraph 1 that______.

A．scientific achievements occur at a slower rate than people"s expectation

B．repairing human bodies and growing new organs have already been realized

C．Alice Park has proved the meaning of stem cells in "The Stem Cell Hope"

D．people are concerned about moral and ethical implications of scientific research

请帮忙给出正确答案和分析，谢谢！