State the Period of the Function $y = \sec 8 x$

Multiple Choice

State the period of the function: $y = \sec 8 x$

A) $\frac { \pi } { 8 }$
B) $\frac { \pi } { 4 }$
C) $\frac { \pi } { 6 }$
D) $\frac { \pi } { 5 }$
E) $\frac { \pi } { 7 }$