What was the PRIMARY motive for the U.S. government's policy of supporting the government of South Vietnam? A Encouraging the spread of economic prosperity B Preventing the spread of infectious disease E Containing the spread of communism B Promoting the spread of democracy

## Step 1<br />The question is asking for the primary motive behind the U.S. government's policy of supporting the South Vietnamese government. The options provided are:<br />A. Encouraging the spread of economic prosperity<br />B. Preventing the spread of infectious disease<br />C. Containing the spread of communism<br />D. Promoting the spread of democracy<br /><br />## Step 2<br />The U.S. government's policy of supporting the South Vietnamese government was primarily driven by the desire to contain the spread of communism. This was during the Cold War era, where the U.S. was actively involved in preventing the spread of communism worldwide.<br /><br />## Step 3<br />The U.S. government believed that if communism was not contained, it would spread to other countries, including the U.S. itself. This belief was the primary reason behind the U.S. government's policy of supporting the South Vietnamese government.