Which statement defines externality? a. it is a change in demand brought about by factors other than price. b. it is the external factors that cause a rise in the supply of goods or services. c. it is the external factors that cause a decrease in the supply of goods or services. d. it is the impact of production and consumption on unrelated third parties.

What comprises a list of main points and sub-points of a topic to include in a presentation

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?

In a market economy, supply and demand are important because theya. (i) play a critical role in the allocation of the economy's scarce resources.b. (ii) determine how much of each good gets produced.c. (iii) can be used to predict the impact on the economy of various events and policies.d. all of (i), (ii), and (iii) are correct.