Answer

A

Explanation

The 1970s was a period of significant political and social turmoil in the United States. The Watergate scandal, which began in 1972, was a major political scandal involving the Nixon administration's attempt to cover up its involvement in the June 17, 1972 break-in at the Democratic National Committee headquarters. This event, along with the subsequent resignation of President Richard Nixon, led to widespread distrust in the government. Additionally, the Vietnam War, which lasted from 1955 to 1975, was a long and costly conflict that resulted in significant casualties and a growing anti-war sentiment among the American public. The war's prolonged nature, perceived lack of clear objectives, and reports of human rights abuses contributed to the skepticism and distrust in government decisions. The other options provided, such as successful military campaigns, the moon landing, and economic prosperity, are not directly related to the distrust in the government during the 1970s.