The correct answer is C.
Both recognize the power of the enemy; however, both maintain that the power of the enemy is nothing against America's power.
Roosevelt says that "the American people in their righteous might will win through to absolute victory." Bush states that "Terrorist attacks can shake the foundations of our biggest buildings, but they cannot touch the foundation of America."
Therefore, both say that, although the United States has been attacked, the nation's strength will defeat the enemy.