Subject: mathqa
Question: { - 10 , - 6 , - 5 , - 4 , - 2.5 , - 1 , 0 , 2.5 , 4 , 6 , 7 , 10 } a number is to be selected at random from the set above . what is the probability that the number will be a solution to the equation ( x - 4 ) ( x + 9 ) ( 2 x + 5 ) = 0 ?
Option: 
A: 1 / 4
B: 1 / 12
C: 1 / 3
D: 1 / 6
Answer: B