Answer:
B
Step-by-step explanation:
A battleground state is a state in which there is no clear historical trend when it comes to how voters will vote. For instance, a state like Florida could vote Republican one election cycle and Democrat the next. For this reason, Florida is a "battleground" state and very important to both the Republicans and Democrats. If you win in a battleground state like Florida, then there is a very good chance that you will win the Presidency.
A "safe state", on the other hand, is a state that is going to almost always vote a certain way. For instance, Texas is considered to be a "safe" state for Republicans, as they have only lost the state once in the last 10 elections.