If Every Firm Knows Its Marginal Cost but a Central

Multiple Choice

If every firm knows its marginal cost but a central planner cannot know every firm's marginal cost, then:

A) central planners will outperform competitive markets.
B) competitive markets will outperform central planners.
C) central planners and competitive markets will perform equally well.
D) it is impossible to say whether central planners or competitive markets will perform better.