The correct answer should be The builders of the Constitution wanted federal and state courts to share power under the Supreme Court.
They anticipated that there would be too many cases and that the supreme court wouldn't be able to deal with everything, so they decided to have lower courts whose power would be limited insofar that they would have to answer to the supreme court if they made a bad decision and eventually people could appeal even at the supreme court if the court would allow them. The federal and state courts have power under the supreme court and the court of appeals are between them and the supreme court.