Final answer:
The true statement is that monopolized economies can result in more poverty and slower economic growth, due to market inefficiencies and higher prices. Meanwhile, competitive markets encourage innovation, though real-world oligopolies and monopolistic competition have various impacts on market dynamics.
Step-by-step explanation:
The correct statement among the options given is that monopolized economies lead to more poverty and less economic growth. This occurs because monopolies can restrict output and raise prices, leading to inefficiencies in the market. In contrast, competitive market economies tend to foster innovation, as firms seek to differentiate their products and vie for market share, which can lead to lower prices and greater variety for consumers. However, it is notable that in real-world situations, firms in an oligopoly may fluctuate between cooperation and competition, affecting market outcomes. In a monopolistically competitive market, firms offer a diverse range of products and induce innovation, though they might not operate at the lowest cost and can incur high marketing expenses.