Answer:
D- Reducing the number of weapons available in the world
Explanation:
In his four freedoms speech Roosevelt says:
<em>"The fourth is freedom from fear, which, translated into world terms, means a worldwide reduction of armaments to such a point and in such a thorough fashion that no nation will be in a position to commit an act of physical aggression against any neighbor—anywhere in the world."</em>
This means that countries should give up arms, and be allowed to conserve as many to protect themselves but not enough to do any harm into his neighbors, this way no one would be able to invade or conquer any other nation.
