Ruby and Sam each roll a fair 6 -sided die with the numbers 1,2,3,4,5, and 6 on its faces. Sam subtracts the number on his roll from the number on Ruby’s roll. What is the probability that the result is a negative number?
Answer Choices
A. \frac{5}{18}
B. \frac{5}{12}
C. \frac{7}{12}
D. \frac{1}{2}
E. \frac{5}{6}