AHSME 1975 Problem 14

If the $whatsis$ is $so$ when the $whosis$ is $is$ and the $so$ and $so$ is $is \cdot so$, what is the $whosis \cdot whatsis$ when the $whosis$ is $so$, the $so$ and $so$ is $so \cdot so$ and the $is$ is two ($whatsis, whosis, is$ and $so$ are variables taking positive values)? $\textbf{(A)}\ whosis \cdot is \cdot so \textbf{(B)}\ whosis \textbf{(C)}\ is \textbf{(D)}\ so \textbf{(E)}\ so\text{ and }so$