According to Coast Guard Regulations (46 CFR), the fuel tanks of motor-propelled lifeboats shall be __________.

Correct Answer: Option B — emptied and the fuel changed at least once each year

Coast Guard regulations under 46 CFR mandate that motor-propelled lifeboat fuel tanks must be emptied and the fuel completely replaced at least once each year to prevent fuel degradation, gum formation, and contamination that could cause engine failure during an emergency.