A school club visits a science museum. Student tickets cost $4 each. Non- student tickets cost $8 each. The club paid $200 for the tickets. Which equation below could NOT model this situation? A. y = 25 - 1/2x B. 4x + 8y = 200 C. x + 2y = 50 D. y = 8 (25 - 1/2x)