In a free and fair elections

a. people vote in secret
b. people votes are counted equally
c. people vote free from intimidation and coercion
d. all of the above

Explanation:

All of them and all of them are important. We live in a country where our leaders respect the results of the vote. It doesn't always happen everywhere. Anyway that comment should be on the list above.

A and C go together. They were not always true. Chicago has a very dark history about C where intimidation was a standard used on voting day.

Some religions used to have a prohibition on voting. They have come to realize that is not very wise. Sometimes people are forced to vote, even if it is in secret. They have also learned that you can spoil your ballot.

The 15th amendment guarantees that there is no such thing as a fraction vote. Prior to it's passing, there was such a thing.  

the answer is c my brotha. c.   formed an alliance with the soviet union.