The Supreme Court expanded the protections in the 14th Amendment in the 1950s by D. It applied the protection to the federal government as well as to the states.
The Supreme Court ruled in the 1950s that states had a duty to protect all people in their jurisdiction equally just like the federal government.
This expansion in the scope of the 14th Amendment was key to making segregation illegal in the United States.
Find out more on the 14th Amendment at https://brainly.com/question/823554.