A vessel would be referred to as "tender" when the weight of the cargo is __________.

Correct Answer: Option C — concentrated high and the double bottoms are empty

A tender vessel possesses a small metacentric height (GM), resulting from a high center of gravity (KG). Concentrating cargo high while keeping double bottoms empty raises the KG, thereby reducing the distance between G and M, which characterizes a tender vessel prone to slow, sluggish rolling motions.