Tatianya and Roy were playing trivia. Tatianya got x questions correct and scored 50 points on each one. The expression below shows Roy's total trivia points:

50x + 20

what does the constant term of the expression represent?

A. The number of points Roy scored more than Tatianya.
B. The total number of questions Roy got correct.
C. The total points Roy earned.
D. The total points Tatianya and Roy earned.