There was much more civil unrest during the 1960s than the 1950s. However, unrest in both decades was caused by the issues of African American rights and grievances. In the 1960s, but not the 1950s, unrest was also caused by the Vietnam War. In the 1950s, there was little civil unrest in the US.
It included all except for C: Cortes.
Increasing the amount of well nourished workers for the factories during the industrial revolution
