Given the Functions Below, Decide Which Function Is F (X)

Given the functions below, decide which function is f (x) , and which is a member of the family . ​ ​

A)
And
Is a member of the family of
B)
And
Is a member of the family of
C)
And
Is a member of the family of
D)
And
Is a member of the family of
E)
And
Is a member of the family of