1. Let $1<x<3,5<y<7$, then the range of $\frac{x}{y}$ is
A. $\left(\frac{1}{7}, \frac{3}{5}\right)$
B. $\left(\frac{1}{5}, \frac{3}{7}\right)$
C. $\left(-\frac{1}{7}, \frac{3}{5}\right)$
D. $\left(-\frac{3}{5},-\frac{1}{7}\right)$
1. A

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