which of the following factors best supports the notion that the u.s. automotive industry is an industry with high entry barriers? a. car manufacturers require high start-up costs and large-scale production in order to be cost-competitive. b. few industrial products are as easy to build as cars powered by internal combustion engines. c. new entrants in the automotive industry expect that incumbents will not or cannot retaliate. d. new auto companies create electric cars powered by simpler motors and gearbox