GRE Text Completion: Maggoosh-GRE填空Maggoosh - BB0EPUD2P4735321Y

The recent discovery of the existence of a far greater number of planets than had previously been thought only ____________ undergirds the argument for intelligent lifeforms; such an argument depends on more than a mere tally of planets, for only those planets that can form a viable atmosphere can host the conditions necessary for life. A. subtly B. minimally C. obliquely D. retroactively E. discursively F. indirectly