Common law evolves in part based on decisions in court cases.
"Common law" in English history was the body of precedents established by courts and procedures from the Middle Ages onward. It wasn't so much that there was a codified system of laws, but there were past practices and procedures that informed legal decisions to be made in the present. The American legal system still takes this sort of approach to law, letting past precedents inform decisions on new situations that arise.
Well, there was the Louisiana purchase
Answer:
Make eye contact
Explanation
The rest of the ways listed are not ways to use body language is a formal discussion
MARTA was not a part of the war on poverty