Here is the right option: the quantity supplied for Grad Nite tickets increases as the price increases. Graduate night attendance has become compulsory, which means that those who did not plan to attend before will now be forced to attend, this will automatically increase the demand for the Grad tickets because more people are planning to attend. Although the price of the ticket has increase, students will still be forced to buy it like that because attendance is mandatory. To increase their profits, the ticket manufacturers will produce more tickets, so the quantity of ticket supplied will increase. Thus, the correct option is D.