Tap water question!!!! Please help!! Dont answer if you dont know please?

Question

A sample of tap water consists of water, fluoride ions, calcium ions, and several other dissolved ions. The ions are evenly distributed throughout the water. Which term or terms could be used to describe this sample of tap water?

Which ones are the answers???!! Please help. This is so confusing

1) mixture

2) heterogeneous mixture

3) homogeneous mixture

4) solution

5) pure chemical substance

6) compound

7) element

Answer 1

if its evenly distributed then its a solution

Answer 2

4) solution

Answer 3

solution or homogeneous mixture