Factor the Given Factor from the Expression $x ^ { - 1 / 7 } ; x ^ { - 1 / 7 } + x ^ { 1 / 7 }$

Multiple Choice

Factor the given factor from the expression.
- $x ^ { - 1 / 7 } ; x ^ { - 1 / 7 } + x ^ { 1 / 7 }$

A) 1
B) $x ^ { - 1 / 7 } \left( 1 + x ^ { 2 / 7 } \right)$
C) $x ^ { 1 / 7 } \left( 1 + x ^ { 2 / 7 } \right)$
D) 0