In the expression 4(2m-n), determine which of the following best describes the role of 2

D) 2 is a coefficient.

Step-by-step explanation:

We are given the expression 4(2m - n)

Here 4 is a factor, 2m and -n are the terms.

Here we need to find the role of 2.

Now let's find the term which has 2.

The term is 2m, where m is a variable and 2 is coefficient.

So, 2 is the coefficient of m.

Therefore, the answer is D) 2 is a coefficient.