In 1965, president johnson significantly increased the numbers of u. s. troops in vietnam because
a. air strikes had made it safe for ground forces to enter the war.
b. communist forces continued to fight despite intense u. s. bombing.
c. south vietnamese troops were no longer willing to fight.

Consider the following invention from the american industrial era. cotton gin – a machine that removed seeds from short-staple cotton which option explains how this invention contributed to the role of the united states as an emerging world power? a. it was in high demand abroad, as many european nations had begun farming cotton. b. it led to the decline of slavery in the south, which enhanced america’s international reputation. c. it freed up many slaves to become factory workers in northern cities, which improved the economy. d. it increased production efficiency of a us cash crop that was in high demand in other nations.