Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?

Correct Answer: Option C — The total area of the vents or the overflow shall be at least 125% of the area of the fill line.

Title 46 CFR and classification society standards require that double-bottom tank vents and overflow systems possess a combined cross-sectional area of at least 125% of the filling line to prevent catastrophic over-pressurization during ballasting or bunkering operations.