Final answer:
The anchor currency in the Bretton Woods System was the US dollar, which was fully convertible into gold at a fixed price, while other currencies in the system had variable exchange rates with the dollar.
Step-by-step explanation:
The anchor currency in the Bretton Woods System was the US dollar. This meant that the dollar was fully convertible into gold at a fixed price, but other currencies in the system had variable exchange rates with the dollar (Option 3). The US government guaranteed that every dollar was backed by gold at a rate of one ounce of gold per 35 US dollars (USD). Other currencies had a fixed parity with gold and also with the US dollar.