In the study of history, which is unchanging over time?
a. nothing, because everything can be re-interpreted
b. the available documents for studying a certain period
c. the eras historians choose to highlight
d. the events that are selected as significant
e. the themes used to organize history

is this a multiple choice question? if so, could i see the answers to give you the right one!

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

the answer would be:

b. race