Notice how this kind of CR usually are NOt tested on the GRE: fill the blank.
Usually, the blank is one of the following things
-weaken
-strengthen
- conclusion
In this case is the second option
however, it cannot be concluded that virtually the
only biologists interested in research that such experiments could address
are those biologists already employed by the space program, since
WHY
because IF we have more biologist OUTSIDE of the space program what the gov is willing to do make sense
D the space program employs only a small percentage of the research biologists employed by the government
This is pretty close because it says the biologist inside the program are < of those outside the program but STILL inside the gov
We want the biologists OUTSIDE completely. For example those unemployed or in other universities. OUTSIDE the gov.
I hope this helps
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