The sum of two or more binary variables must be less than or equal to one in a __________ constraint. multiple-choice corequisite mutually exclusive conditional Question at position 60 60 Multiple Choice 1 point Question at position 60 The linear program that results from dropping the integer requirements for the variables in an integer linear program is known as a binary integer linear program. a mixed-integer linear program. convex hull. LP relaxation. Question at position 61 61 Multiple Choice 1 point Question at position 61 The imposition of an integer restriction is necessary for models where nonnegativity constraints are needed. the decision variables cannot take fractional values. possible values of variables are restricted to particular intervals. variables can take negative values