Which statement about the early indus river
valley civilization is an opinion rather than a fact?
(1) farmers grew a surplus of barley, wheat, and
dates.
(2) the indus people developed a system of
writing.
(3) planned cities indicated a use of technology.
(4) the indus city-states were the most
developed of the time period.

your answer will most likely be a.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.