An example of a disadvantage status is like.... living in poverty, going to school during the day, and working at night 6 days week to support your younger brothers and sisters.
Living in rural area is not disadvantage status (at least not what admission are looking for).
I believe the disadvantage status is something that... makes it hard for you to obtain equal education as the average middle-class individual. Living in a rural area, and assuming your family is middle class, you can easily move into a big city and attend college there.