Harappa and Mohenjo-Daro, the Two Major Cities of Harappan Culture

Harappa and Mohenjo-Daro, the two major cities of Harappan culture,:

A) Harappa and Mohenjo-Daro, the two major cities of Harappan culture,:
B) Were built on high natural plateaus, simplifying both defense and water drainage.
C) Show a cultural variation much greater than the cities of Old Kingdom Egypt.
D) Were deficient in sanitary provisions, such as drains and gutters.