privately owned warships

Well you can but you can't have it armed.

Explanation: you can own a warship but can't have any armaments'. So if wanted to buy a battleship it would be stripped from it's main armaments to secondary armaments to it's anti-aircraft and anti-submarine warfare equipment.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.