giladedelman Wrote:"Despite decades of rhetoric from historians of science about the need to unite issues deemed "internal" ... and those considered "external" ... that dichotomy has proven difficult to set aside."
So, the author is saying that historians of science have been paying lip service to an idea, but have had trouble putting it into practice. Wow, I didn't even realize that's almost the exact wording of answer (C).
I don't really see how rhetoric implies all this.
1. they were unable to do something
2. they were innovative ideas
3. they were even trying to put something into practice.
I can see how this could be right, but I don't see how with all these assumptions, D. isn't a better answer.