Individuals who are approximately the same age and are linked by common interests, including friends,
classmates, and the 'kids in the neighborhood,' are most appropriately referred to as
a) significant others
b) generalized others
c) peers
d) confederates

Individuals who are approximately of the same age and are linked by common interests, including friends, classmates, and the “kids in the neighborhood,” are most appropriately referred to as peers. So the answer to the given question is option “C”. The word peer is thought to have originated in the late 16th century.  People are of the opinion that this word might have originated from the English word appear or pier. There is no definite proof as to the word from which peer exactly originated.