Identify Which of the Twelve Basic Functions Listed Below Fit $y = \sin x , y = \cos x , y = x , y = x ^ { 3 }$

Multiple Choice

Identify which of the twelve basic functions listed below fit the description given.
-The four functions whose graphs look the same turned upside down

A) $y = \sin x , y = \cos x , y = x , y = x ^ { 3 }$
B) $y = x , y = x ^ { 3 } , y = \frac { 1 } { x } , y = \sin x$
C) $y = x , y = \frac { 1 } { x } , y = \sin x , y = \frac { 1 } { 1 + e ^ { - x } }$
D) $y = x , y = x ^ { 3 } , y = \frac { 1 } { x } , y = \cos x$