Suppose you bought three tickets to a concert in advance at the University ticket window. At the last minute one friend cancelled, so you could use only two of those tickets. You scalped, or sold, the third ticket just outside the entrance to the concert for slightly more than the price you had originally paid. Which transaction occurred in a market?

A、Onlythetransactionthatoccurredtheeveningoftheconcertwasamarkettransaction.;
B、NeithertheadvancesaleattheUniversityticketwindownorthesalethenightoftheconcertoccurredinmarkets.;
C、OnlytheadvancepurchaseandsaleattheUniversitywindowwasamarkettransaction.;
D、Bothtransactions,theoneattheUniversityticketwindowaswellasthesaleattheconcertentrance,occurredinmarkets.