单选题 Which of the following statements least accurately describes why firms can coordinate economic activity more efficiently than markets? Firms can achieve:

A. economies of scope.
B. diversification benefits.
C. economies of scale.

【正确答案】 B

【答案解析】Firms can often coordinate economic activity more efficiently than markets because firms can reduce the costs of market transactions, and they can achieve economies of scale, scope, and team production.