2003 AMC 10B Problems/Problem 1

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1. Which of the following is the same as

$\frac{2-4+6-8+10-12+14}{3-6+9-12+15-18+21}$?

$\textbf{(A)}\ -1 \qquad \textbf{(B)}\ -\frac23 \qquad \textbf{(C)}\ \frac23 \qquad \textbf{(D)}\ 1 \qquad \textbf{(E)}\ \frac{14}{3}$