The Type of Market in Which Businesses Possess the Least

The type of market in which businesses possess the least market power is a(n) :

A) monopoly, as it has no competitors
B) oligopoly, as each business's size is large relative to the industry
C) monopolistically competitive market, as each business differentiates its products
D) perfectly competitive market, as each business is a price-taker
E) competitive monopoly, because it combines both competition and monopoly