Question 2 0.3 Tokamak deuterium fusion reactors are expected to become a source of cheap and clean energy. However, that will only happen after design issues are ironed out in an expensive process of R&D, trial, and error. Until then, the US energy giants such as NextEra or Duke continue to build gas turbines as well as wind and solar for energy generation. Most ironically, Westinghouse Electric boasts the slogan "shaping energy's future" but is sticking to uranium fission reactor designs from the 1970s. The above case is an example of what kind of market failure? Explain your choice(s) in your written work (1 short sentence per choice). natural monopoly O brand-based monopoly O positive externality negative externality freeridership