What is the most likely effect that a war might have a food security?
a. crops would be burned and convoys attacked to deny food sources to the enemy
b. the demand for food would go down because the population would be focused on the war
c. war would provide more incentives for governments to produce food
d. conquered territory would provide more land to produce food for everyone

What is the most likely effect that a war might have a food security? 

A. Crops would be burned and convoys attacked to deny food sources to the enemy

During war time, everything is done to ensure victory. Food and water of the enemies are either confiscated or burned down. Enemies will be starving and dehydrated making them susceptible to sickness or death. Decreasing there numbers and making it easier to defeat them in battle.