A box contains 500 marbles. The result of 20 marbles pulled at random from the box is given below. • 5 red marbles • 6 blue marbles • 3 green marbles • 4 black marbles • 2 yellow marbles Based on this information, how many black marbles could be expected in the box?
A) 80
B) 100
C) 110
D) 120