Identify Which of the Twelve Basic Functions Listed Below Fit $y = x ^ { 2 } , y = x ^ { 3 } , y = \sin x , y = \cos x$

Multiple Choice

Identify which of the twelve basic functions listed below fit the description given.
-The four functions with local minima

A) $y = x ^ { 2 } , y = x ^ { 3 } , y = \sin x , y = \cos x$
B) $y = \sqrt { x } , y = \sin x , y = \cos x , y = x ^ { 2 }$
C) $y = x ^ { 2 } , y = \sin x , y = \cos x , y = | x |$
D) $y = \sin x , y = \cos x , y = | x | , y = \frac { 1 } { 1 + e ^ { - x } }$