The passage's discussion of "free time" suggests that A. senior scientists in industry have been less likely than junior scientists to remain in positions where opportunities to conduct their own research are restricted B. scientists who work in industry can gain financially from their own independent research as well as from research they conduct for their companies C. scientists who work in industry have tended to become frustrated by their employers' expectations that their research will be restricted to areas deemed to be in the employers' interests D. industry has sometimes been willing to support scientific research that has no prospect of yielding a direct profit E. industrial scientists have not differed from academic scientists in the amount of time they are able to dedicate to pure research