According to Chapter 10 in Strategy in the Contemporary World

According to Chapter 10 in Strategy in the Contemporary World, powerful navies are unique for all of the following reasons, except

A) in liberal democracies, their capabilities tend to exceed those of armies and air forces.
B) they have a significant proportion of their ships at sea even in peacetime, while armies and air forces only deploy for combat when danger looms.
C) they can respond quickly to trouble, which also allows them to deter certain kinds of trouble from happening in the first place.
D) in contrast to long-range land-based aircraft, they offer a more diverse array of choices, including prolonged observation, delivery of an implied threat, air strikes, and the mounting of an amphibious assault.