<span>Lack of technology to use them caused the cold war leaders to hesitate to use nuclear weapons.
</span><span>B. Lack of technology to use them </span>
There is always the possibility that he would have, yet there are reasons as to why he would not have been to enthusiastic in supporting it too strongly. One of these reasons is that Lincoln supported joining the South and the North as fast as possible to make the Reconstruction after the Civil War more smooth and faster. If he openly supported the rights of the Black people the South would not have supported him as much as they would if he had not done so. This would go against what Lincoln wanted the United States to do to heal, somethign that Lincoln's vice president also shared with him.
Explanation:
the US government might support the road because they might be able to use the railroads to transport materials for men at war or other materials the country might need.
A lumber producer in New Brunswick might support it because the railroad will require wood for the tracks. The lumber producer can profit from this because the railroad would need a large supply of lumber. They can also use it to transport the lumber.