I Have An Essay For Your Needs. This isn't my Work But I've Used It With Questions Like those Above
https://ilakenya.org/what-about-public-participation-where-are-we/
Answer:
C
Explanation:
The President has the power to do A and D and he was most know for C
That the Germany plans were a complete success in horror
20 years difference - (0AD - 10BC = 10 years) + (0AD + 10AD = 10 years)