If $$I_n = \left\{x \epsilon R: -\frac{1}{n} < x < \frac{1}{n}\right\}$$ for n = 1, 2, 3, ........... then
$$\bigcap_{n=1}^{\infty}I_n =$$

A

$$\left\{0\right\}$$

B

$$\varnothing$$

C

$$\left\{1\right\}$$

D

$$\left\{x \epsilon R: 0 < x < 1\right\}$$