In order to prevent the unnecessary release of hydrocarbons to atmosphere, when taking on departure ballast, one method used is to _________.

Correct Answer: Option A — allow entering ballast to displace the inert gas to a tank where cargo is currently being discharged

Under USCG National Maritime Center examination standards, the accepted correct answer is: allow entering ballast to displace the inert gas to a tank where cargo is currently being discharged.