The correct option is C. It shows a positive effect of the solution.
The topic of the presentation is the impact of excessive homework on highschool. The word "excessive" implies that the amount of homework given at highschool has a negative effect on students. The solution would be to have "less homework" and she finds out a positive effect of such a solution. If students are given less homework, they will have time to do other enriching activities and spend time bonding with their loved ones.
D. The enemy is crafty, unscrupulous, experienced in deception.
This is the best choice. By calling the enemy crafty, unscrupulous, experienced in deception, Stalin is feeding the hatred the people have for the enemy. He is detailing the traits that are not desired and makes the people feel as though they are justified in their efforts to defeat the enemy. These details are also insulting to the enemy and could also be used to incite the enemy.
They are nominated by the President of the United States and confirmed by the senate.
Technology. Technological innovation represents the central source of society's problems in Fahrenheit 451. Throughout the book, Bradbury treats technology as inherently anesthetizing and destructive. In the prehistory of the novel, technology played an important role in the social decline of reading.