AMC 8 1986 Problem 17

Let $\text{o}$ be an odd whole number and let $\text{n}$ be any whole number. Which of the following statements about the whole number $(\text{o}^2+\text{no})$ is always true? $\text{(A)}\ \text{it is always odd} \text{(B)}\ \text{it is always even}$ $\text{(C)}\ \text{it is even only if n is even} \text{(D)}\ \text{it is odd only if n is odd}$ $\text{(E)}\ \text{it is odd only if n is even}$