Which of the Following Is True of Code-Law Systems

Which of the following is true of code-law systems?

A) They represent a legal system that is not all-inclusive.
B) They establish ownership of intellectual property by prior use rather than registration.
C) They originate from tradition, past practices, and legal precedents set by the courts through interpretations of statutes, legal legislation, and past rulings.
D) They sometimes fail to consider agreements to be enforceable unless properly notarized or registered.
E) They fail to consider unforeseeable human acts such as riots as acts of nature.