4. Which candidate's performance in the first televised debate helped his campaign?
O John F. Kennedy
• Dwight Eisenhower
Richard Nixon
Lyndon Johnson

John F Kennedy

Explanation:

The 1st televised debate in the US political history was between Mr John F Kennedy and his counterpart Mr Richard Nixon. The debate was keenly followed by voters across the United States and had a major electoral impact too.

The whole event was one of the watershed events in the history of US politics. The consequent presidential election saw record voter turnout and closely fought election with Mr Kennedy raining the last punch.

Mr Kennedy with 49.7% votes fared marginally better than Mr Nixon who received 49.5% votes. Later It was revealed that the debates influence more than 75% of the voters and marked a turning point in the history of mass media.

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain