Subject: mathqa
Question: each factor of 240 is inscribed on its own plastic ball , and all of the balls are placed in a jar . if a ball is randomly selected from the jar , what is the probability that the ball is inscribed with a multiple of 15 ?
Option: 
A: 5 / 42
B: 1 / 4
C: 1 / 16
D: 3 / 16
Answer: B