Adisadvantage of adding a salad bar to a school lunch menu would be longer lines for food. a shorter lunch time. higher costs for students. lower food quality.

higher costs for students is the correct answer.

Explanation:

A disadvantage of adding a salad bar to a school lunch menu would be  higher costs for students because salads bars are very healthy foods are good for health but the ingredients present in the salads are very costly thus due to the cost of lunch will increase.

Salad bars provide chopped tomatoes, lettuce, sliced green vegetables such as carrots, olives, cucumbers, celery, and different raw, bacon slices.

Salad bars can improve participation in school lunch as it offered various green vegetables and fruit choices.

i believe it is the second one.   if correct plz mark brainliest.