The answer is:

c. Get the Meningococcal vaccine.

The very best way to protect yourself from getting Meningococcal Disease is by getting vaccinated. Anybody at any age can get meningococcal disease. In fact, close to 3,000 people each year in the U.S. have a serious infection from meningococcal bacteria. Living in close quarters such as a dorm puts you at higher risk of getting meningococcal disease. Sharing water bottles or kissing someone who has the meningococcal bacteria in their throat is definitely a way of getting it. Traveling to places where meningococcal disease is common (such as certain regions of Africa) is another reason to get vaccinated.