The Reason(s)for Locating Constitutional or Statutory Law First When Researching

The reason(s) for locating constitutional or statutory law first when researching primary authority is (are) that:

A) The constitutional or statutory provision may answer the question,and reference to other law is not required
B) The court opinion interpreting the law may be included with the constitutional or statutory provision
C) The annotations that follow the constitutional or statutory provision may refer to case law that interprets the law
D) All of the above
E) Answers a and b above
F) Answers a and c above