The most likely political effect of adding healthier options to a school lunch program is

The most likely political effect of adding healthier options to a school lunch program is helping the school board president get reelected.
If the school board president wants to implement some new changes into that particular school, and changes which are actually good, like adding healthier options to a school lunch program, chances are he or she is going to get reelected. This is because parents want their children to eat healthy so obviously they are going to vote for someone who will provide them with that.

D. Raising union morale and damaging confederate morale Vicksburg was a major trading town and the gateway to the Western confederacy, so the loss of it split the confederacy up, isolating the capitol in Virginia. This also disrupted the flow of trade and transportation of materials, which would affect the rest of the war.