A teacher tells the class,


"Think of a number, add 1 to it, and double the result.  Give the answer to your partner.  Partner, subtract 1 from the number you are given and double the result to get your answer."


Ben thinks of $6$, and gives his answer to Sue.  What should Sue's answer be?
$\text{(A)}\ 18 \qquad \text{(B)}\ 24 \qquad \text{(C)}\ 26 \qquad \text{(D)}\ 27 \qquad \text{(E)}\ 30$
Ben adds $1$ to $6$, getting $1 + 6 = 7$.  Then Ben doubles it, to get $7\cdot 2 = 14$.  He gives this number to Sue.  Then Sue subtracts $1$ from the number, to get $14 - 1 = 13$.  Finally, Sue doubles the result to get $13\cdot 2 = 26$, and the answer is $\boxed{C}$.