Solve the Following Equation $\tan ^ { 4 } x - 1 = 0$

Multiple Choice

Solve the following equation. $\tan ^ { 4 } x - 1 = 0$

A) ​ $x = \frac { \pi } { 2 } + n \pi$ ,where n is an integer
B) $x = n \pi \text { and } x = \frac { 3 \pi } { 2 } + 2 n \pi$ ,where n is an integer
C) ​ $x = n \pi \text { and } x = \frac { 3 \pi } { 4 } + n \pi$ ,where n is an integer
D) $x = \frac { \pi } { 4 } + \frac { n \pi } { 2 }$ ,where n is an integer
E) ​ $x = n \pi \text { and } x = \frac { \pi } { 2 } + n \pi$ ,where n is an integer