Which of the following is true of the relationship between the value of the optimal integer solution and the value of the optimal solution to the LP relaxation?
a) The value of the optimal integer solution is always greater than or equal to the value of the optimal solution to the LP relaxation.
b) The value of the optimal integer solution is always less than or equal to the value of the optimal solution to the LP relaxation.
c) The value of the optimal integer solution is always equal to the value of the optimal solution to the LP relaxation.
d) There is no relationship between the value of the optimal integer solution and the value of the optimal solution to the LP relaxation.