What is the doctrine of Incorporation.?

A$)$ The U$.$S Supreme Court declared the Separate but equal can never be equal.

B$)$ The U$.$S Supreme Court allowed the state and federal government to come up with a compelling reasonable reason why people with disability may not receive full access in some cases

C$)$ The US Supreme Court applied the Bill of Rights to the states through the $14$th

D$)$ The Supreme Court declared that no one is above the law not even the president.