$\_\_\_\_\_\_$ constraints essentially state that input $=$ output and ensure that the flow of material or money is accounted for at locations or between time periods.

Question $8$ options:

Requirements

Proportional relationships

Balance

Limitationsips

Balance

Limitationsously satisfies all the constraints

the Allowable Increase or Allowable Decrease values for changing cells are zero

there is exactly one solution that will result in the maximum or minimum objective