Find the Interval of Convergence of the Power Series $\sum_{n=1}^{\infty} \frac{x^{n}}{n}$

Find the interval of convergence of the power series $\sum_{n=1}^{\infty} \frac{x^{n}}{n}$ .

A)
B) $-1 \leq x<1$
C) $-1 \leq x \leq 1$
D)