Answer: A. The problem and solution organizational pattern creates a mood of hope and possibility; this persuades Americans that they must act to secure a more certain future.
Explanation: In the given excerpt we can see a text with a problem and solution organizational pattern, the problem is the necessity of having a free and peaceful world and the solution is that the peace-loving nations must make an effort to uphold laws and principles on which alone peace can rest secure. This organizational pattern creates a mood of hope and possibility and this persuades Americans that they must act to secure a more certain future, so the correct answer is option A.