D is your answer. Socratic discussions are among students. Hope this helps!
During 1968, the turmoil created chaos, political, and civil rights problems caused by race segregation protests. A media report gave information on a speech given by the Speaker of the Democratic Party on behalf of the running President. It left a negative impact when he opted of violence using police force strategies to end the protests while people riot for their rights. It turned the tide in favor of the Republicans President Nixon and George Wallace.
The open door policy was principles that was installed in 1899 and then the 1900s to Have a protection of equal or even trading among countries