Answer:
c. the rules issued by federal administrative agencies.
Explanation:
In this case, only the status enacted by Congress, and the rules issued by administrative agencies are sources of law. The primary source is the law issued by Congress, because Congress is the primary lawmaker in the United States. The executive departments (administrative agencies) use the input from congress to establish regulations that both public and private organizations have to follow.
The instructions issued by private associations, the orders posted by employees, memos and news stories are not sources of law.