Please provide an answer with a thorough explanation on how you go to your answer and step by step instructions where necessary. Thank you.

1.The National Football League "blocks out" local television broadcast of football games when the game in question is not sold out in advance. The NFL supports this action because it:

a.Increases the demand for football tickets

b.Reduces the supply of football tickets

c.Reduces the price of football tickets

d.Increases the amount of money that the networks pay to televise NFL games