Over the last few years, in several countries, there have been large outbreaks of the influenza virus. which statement correctly describes the outbreaks?

this represents an epidemic because the outbreaks were a viral, not a bacterial, illness.
this represents a pandemic because it involves an illness that has no known cure.
this represents an epidemic because the outbreaks were contained to the individual countries.
this represents a pandemic because the outbreaks took place in several different countries.