Answer:
Restoring American confidence.
Step-by-step explanation:
Richard Nixon became the 37th President of the United States from 1969-74. His presidency was a huge turning point in America's domestic front as the country was divided in the case of the Vietnam war, while women's rights activists were pressing for equality and racism was also prevalent, leading to more issues than enough.
While these issues prevailed, the next president is sure to be met with the task of trying to find a possible solution. So, one challenge of Richard Nixon's presidency is to restore the confidence of the American people in the face of the division regarding the involvement of America in the Vietnam war.
Thus, the correct answer is the second option.