单项选择题

How does the author feel about the prospects of achieving unity in the discussions of international research

A．Hopeful.
B．Revolted.
C．Doubtful.
D．Confident.
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单项选择题
According to the first paragraph, one of the concerns related to international biomedical research is ______.
A．whether the experimented treatments should be compared against local standards
B．whether the experimented treatments are shown to be effective
C．when local communities will be able to carry out their own research projects
D．the prohibitive costs involved
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