Bill Gates argues that left to its own devices, the free market (i.e. investors) won't invest in energy research and development because_________. Question 10Answer a. there's no fortune to be made b. there's a great deal of uncertainty about which new technologies will be successful c. there's no incentive to abandon the current fossil fuel technologies. d. the returns on investment are often small and a long time coming. e. all of the above correctly describe Gates' argument. f. Only a and b correctly describe Gates' argument