Question

Many military submarines are powered by on-board nuclear reactors. This type of energy source is favored because A. They can be converted into nuclear weapons at a moment's notice for use in wartime B. They can be easily replenished even when the submarine is submerged in deep waters C. They supply a lot of energy but do not take up a lot of space D. They are 100% efficient and do not produce any form of waste

Answer 1

The answer is; C

Nuclear reactors are small and lightweight (ratio of size to power generated) and provide energy reliably compared to other sources. They can carry their own weight by many folds ration. This is why they are also muted as the ideal source of energy in space exploration.