Consider a shortest-route problem with 6 intermediate nods with all nodes connected except for (1) the route between the origin and destination and (2) route between one of the intermediate nodes and the destination. How many decision variables and how many constraints will there be in the formulation of this problem? A. 8 constraints 40 decision variables. B. none of the above or below choices is correct. C. 7 constraints 42 decision variables. D. 8 constraints 441 decision variables