You want to pursue multiple goals with a mathematical programming problem. Your

idea is to pursue the highest priority goal first. The second phase involves pursuing

the secondary goal without sacrificing progress toward the primary goal. Using the

optimal solution toward the primary goal you set the achievement on the primary

goal up as an equality constraint. Then you set the objective as the secondary goal

and solve the problem again with the additional constraint. This process described

which type of goal programming?

a$)$ structural goal programming

b$)$ simultaneous goal programming

c$)$ hierarchical goal prograraming