In general, which of the following is true? a. the number of firms in the industry is far more important than the industry's scientific character and extent of technological opportunities.
b. the greater an industry's concentration ratio, the higher are its R&D expenditures in relation to sales.
c. the industry's scientific character and extent of technological opportunities often are more important than the industry's concentration ratio.
d. the higher the industry's interest cost of borrowing funds for R&D, the greater is the industry's progressiveness.