A building has x floors. The number of apartments on each floor is 6 less than the number of floors. The number of rooms in each apartment is 1 less than the number of apartments on each floor. The expression below shows the total number of rooms in the building:

x(x - 6)(x - 7)

Part A: What does x(x - 6) represent? (4 points)

Part B: What type of polynomial is x(x - 6)(x - 7)? (3 points)

Part C: What is the degree of the polynomial x(x - 6)(x - 7)? (3 points)