For Some Products,quality Is Virtually Impossible to Determine Prior to Purchase.If

Multiple Choice

For some products,quality is virtually impossible to determine prior to purchase.If sellers of such commodities are rational,they will cheat or engage in unethical behavior only when:

A) laws allow unethical behavior.
B) the expected gains are greater than the expected costs.
C) production exhibits positive externalities.
D) the expected gains are equal to the expected costs.