Suppose a country's workers can produce 4 watches per hour or 12 rings per hour. If there is no trade,

• A. the domestic price of 1 ring is 1/4 of a watch.
• B. the domestic price of 1 ring is 3 watches.
• C. the domestic price of 1 ring is 1/3 of a watch.
• D. the domestic price of 1 ring is 12 watches