From what google is telling me. It is about primary and secondary source.
The correct answer is Harappa. Out of all the given options, this civilization is the only one that developed in the Indus Valley, todays Afghanistan, Pakistan and north India. City of Harappa was one of the cradles of the early civilization.
The reason why Stalin decline to Participate in the marshall plan is because Stalin believed that the marshall plan would restore Germany and make it a threat again
<span>Stalin hoped to keep Germany and Western Europe weak.
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During the 1850s, tensions between the North and South increased as the nation decided to how to incorporate the vast territories that had been acquired during the Mexican-American War of 1846-1848. The question of whether each territory was to be slave or non-slave worsened sectional tensions.
