What Was the Result of the Supreme Court's Review of the Federal

What was the result of the Supreme Court's review of the federal sentencing guidelines in Booker v. Washington?

A) The guidelines set forth in the Sentencing Reform Act were made more advisory than mandatory.
B) The Sentencing Reform Act was declared unconstitutional.
C) Judges were given less discretion in sentencing white-collar offenders.
D) The guidelines were revised to allow harsher sentences.