How were Indus Valley cities different from cities of other early civilizations? A. They were neatly planned. B. They developed near rivers. C. They were fortified with large stone walls. D. They were home to a large population.How were Indus Valley cities different from cities of other early civilizations? A. They were neatly planned. B. They developed near rivers. C. They were fortified with large stone walls. D. They were home to a large population.