Disprove the statement by giving a counterexample. I am confused about this question. It says

Disprove the statement by giving a counterexample.
For all positive integers $n$, $n^2- 2n$ is positive.

Then it gives me these choices:
4
1
0
1/2
2
So I did my math and pugged in the first one (4)
And got $4^2 - 2(4) = 16 - 8 = 8$
So would I check mark $4$ as a answer, or do I need a answer where the final result is NOT positive, like plugging in $1$, which will give me a answer of $-1$ ?

You want to disprove the statement, so you want to produce an answer that makes the statement "$n^2 -2n$ is positive" incorrect. A counterexample would be an integer value of $n$ which shows this to be false; choose $n = 1$.
