Mark each description if it is a feature of ancient indus cities.
a. a sanitation system
b. huge structures that served as temples
c. a large, central building that stored grain

The one that is a feature of ancient Indus cities is  :
B. Huge structures that served as temples
C. a large , central building the stored grain

Sanitation system only been popularized in the 1900s, so there is no way it exist in ancient Indus city

hope this helps