Which of the following is a definition of the gold standard

The Gold Standard was a weekly newspaper published by the News Enterprise from 1948 to 2018. Designed to serve military and civilian personnel on the U. S. Army post Fort Knox, it was produced under a partnership arrangement with the Army, though was editorially independent.

A monetary standard under which the basic unit of currency is defined by a stated quantity of gold and which is usually characterized by the coinage and circulation of gold, unrestricted convertibility of other money into gold, and the free export and import of gold for settling of international obligations.