The correct answer for this question would be option D. FEAR. The one that is considered to be the most influential factor in facilitating Mitchell Palmer's campaign to rid the United States of any radical ideology is the Fear. Fear is a series of police actions, which helped Palmer in his<span> campaign against radicalism. Hope this helps.</span>
✰ <u>Answer</u><u> </u><u>:</u><u>-</u>
⠀
The three key roles of the President are as follows :-
⠀
1. <u>Chief</u><u> </u><u>of</u><u> </u><u>State</u><u> </u><u>:</u><u>-</u>
⠀
Every state or nation must have a chief of state that is the representative of the country. In USA, the President acts like the chief of state, but this is not the case with all the countries.
⠀
2. <u>Chief</u><u> </u><u>Executive</u><u> </u><u>:</u><u>-</u>
⠀
The President acts as the chief executive of the nation, that is works to execute or amend different laws, and also, appoints key officials.
⠀
3. <u>Chief</u><u> </u><u>Diplomat</u><u> </u><u>:</u><u>-</u>
⠀
The President plays a very important role in the nation's relationship with other nations. He/She acts to maintain peace their and other nations.
⠀
There are many other roles of the President as well, but out of all, these were the most important roles played by the President.
⠀
![\underline{ \rule{230pt}{2pt}} \\ \\](https://tex.z-dn.net/?f=%20%5Cunderline%7B%20%5Crule%7B230pt%7D%7B2pt%7D%7D%20%5C%5C%20%20%5C%5C%20)
The United Nations is the organization!
With the Truman Doctrine, which was a promise to aid nations struggling communist movements.
D. Gold
I hope I helped!!!