A sports team came to town. The stadium filled all 10,000 seats at two-level pricing. Level 1 tickets are $50 each, and level 2 tickets are $150 each. The stadium made $75,000 in ticket sales. The system of equations that models this scenario is:x + y = 10,00050x + 150y = 75,000What do the x and y represent in the system?A.x represents the number of level 2 tickets; y represents the number of level 1 ticketsB.x represents the cost of level 1 tickets; y represents the cost of level 2 ticketsC.x represents the cost of level 2 tickets; y represents the cost of level 1 ticketsD.x represents the number of level 1 tickets; y represents the number of level 2 tickets