Assuming that this is referring to the same list of options that was posted before with this question, the best option is that he knew a land invasion would cost thousands of lives.
<h3><u>Factors considered by Roosewelt in shaping America’s strategy for global conflict:</u></h3>
President Franklin D. Roosevelt considered the importance of United States in the world and its critical role to play in global development while shaping the America's strategy for global conflict.
1. The President had believed the America has a very critical role to perform globally.
2. He took care of the foreign affairs policies of the nation but he also came up with his own deals for speeding up the development process.
3. His main aim was to bring the nation and its people back on the track of progress from the serious depressing phase.
4. He took the issue of home grown economy very seriously and focused on its development.
5. He worked with other big powers globally to stabilize the international economy.
6. He gets the title of most favored nation for the United States and get the trading agreements with other countries to increase the economic state of the America.
7. He established the greatest foreign policy of “good neighbor” toward other western countries and grab their supports as well.
