What are the requirements for taking part in a federal election? check all that apply. felon citizen above the age of 18 registered with a state to vote english speaker

In order to take part in a federal election you need to:

1: be a U.S. citizen (either by birth or naturalization)  

2: be above the age of 18

3: be registered with a state to vote. This is to say that you have to be legally registered to vote in your jurisdiction so that you can vote in federal elections.

4: be an English speaker

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;