1. An integrality condition indicates that some (or all) of the? 

a. RHS values for constraints must be integer 

b. Objective function coefficients must be integer 

c. Constraint coefficients must be integer 

d. Decision variables must be integer  

2. Which of the following are potential pitfalls of using a non-zero suboptimality tolerance factor? 

a. No assurance the returned solution is optimal. 

b. No assurance the returned solution is integer. 

c. The true optimal solution may be worse than the returned solution. 

d. There are no pitfalls to consider since the Solver will obtain solutions quicker.