Selling food locally increases sustainable use of the land because crops can be rotated more easily. What is a cost of this practice?

A. There is less CO2 emitted from transportation.
B. Less water is used to irrigate the crops.
C. Food spoils more quickly when it is not processed.
D. More packaging is needed for transportation.

( The "There is less CO2 emitted from transportation" is not correct, I've tried it twice, and have gotten it incorrect each time, please help!!!