Which expression has a coefficient of positive 1 for the term n?

A) 5n2 + 6n - 1

B) 2n2 - 5n + 1

C) 3n2 + n - 2

D) 4n2 - n + 9

Opt C.

Step-by-step explanation:

The coefficient is a numerical constant placed before the variable, very often the coefficient stands out by its own (coefficient of n in opts A, B, D), but sometimes is hidden from view, because it is a mathematical convention not to show it, this happens when dealing with 0 and with 1,

as you can see in Opt C, the coefficient is not shown, but is there and it is hidden from view