Final answer:
The Harappans valued cleanliness and hygiene as evidenced by their public baths, sophisticated drainage systems, and provision of running water to homes.Option b is correct answer.
Step-by-step explanation:
The fact that supports the theory that the Harappans valued cleanliness and hygiene is b. they had public baths. The Great Bath of Mohenjo-Daro is a significant piece of evidence highlighting their sophisticated approach to sanitation. This public bath, along with the city's drainage system, ensured that the residents had access to clean water and an efficient way to remove waste water from the city, which reflects the high priority the civilization placed on cleanliness and hygiene. Additionally, homes in the Indus Valley civilization were equipped with wells that provided running water to bathrooms, and there were extensive citywide drainage systems, emphasizing their commitment to hygiene for all classes.