The correct answer is: The Supreme Court can overrule decisions made by the lower courts.
Given that the Supreme Court is unable to attend to all the cases available, lower courts are appointed to take the job, while the Supreme Court focuses mainly on matters of federal jurisdiction - cases that impact the entirety of the country.
However, the Supreme Court may also take a lower court case cannot come to an agreement on how to interpret the law involved. Lower courts are not allow to interpret the law different as other courts would, and therefore, the Supreme Court may take over and overrule decisions made by the former.