If price is set equal to marginal cost when marginal cost is below ATC, the firm will suffer a loss

Which of the following statements is true of the federal funds market?

A) No banks are refused loans in the federal funds market. B) Although the federal funds market aims to provide liquidity to needy banks, it is not very popular as overnight loans are logistically inefficient for large banks. C) In the federal funds market, banks with a shortage of reserves borrow funds, while banks with an excess of reserves lends them out. D) The interbank lending system works more efficiently in periods of financial panic than in periods of financial stability.

Why are public goods non-rival in consumption? Explain with a real-world example

What will be an ideal response?