This act was passed by congress to protect the voting rights of blacks in the south, it wasn’t very effective.
a. civil rights act of 1866
c. enforcement act of 1870
b. voting rights act of 1867
d. the ku klux klan act of 1874

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.