Ceteris paribus, in a closed economy, if consumers become more pessimistic ________

In which market structure does one firm sell a good or service with no close substitutes and there is a barrier blocking the entry of new firms?

A) only monopoly B) only oligopoly C) perfect competition D) monopolistic competition E) either monopoly or oligopoly

Changing how production is organized cannot result in changes in productivity

Indicate whether the statement is true or false