Answer:
The answer is "weigh advantages and disadvantages".
Step-by-step explanation:
Whenever you are analyzing any problem, it is important to consider what are advantages and disadvantages to make any changes to a particular situation. As in the given question when you are going to consider whether it is cost effective to add a salad bar to a school lunch menu or not, you should weigh advantages and disadvantages of that. By using this step , you will get better option.