One Difficulty with Direct Government Support of R&D Is That

One difficulty with direct government support of R&D is that it inevitably involves government decisions about _______.

A) whether it can agree on the amount of social benefit conferred to private firms
B) which of the vast number of proposed projects are worthwhile
C) the location of the congressional district receiving the research funding.
D) quantifying the social benefit conferred on a private firm by an R&D tax reduction.