D.
Stare decisis refers to the guiding principle that law should build upon that which came before it.
Justices can, of course, full reverse precedent, but many justices instead choose to nitpick and build and parse so as to build a more complex bed of common law.
A. Monarchy
A monarchy is handed down by royalty/relation
The answer is a
hope it helps
The nervous system, because it shows how the genes are generated
