What Is the Confidence Level of the Following Confidence Interval $\mu$

Multiple Choice

What is the confidence level of the following confidence interval for $\mu$ ?
$$\bar { x } \pm 1.645 \left( \frac { \sigma } { \sqrt { n } } \right)$$

A) $98 \%$
B) $90 \%$
C) $165 \%$
D) $95 \%$