Are typically used by doctors in order to determine if a child is developing normally.
a. environments
b. maturations
c. genes
d. percentiles

a.a.a.a.a.a.a.a.a.a.a.aa..a.a.a...a.aa..a.a.a.a.environments

a

Explanation:

there is no options  

df

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.