At several locations in Rome, there were many public toilets that were

D. In full view of the public

Explanation:

The communal toilets in ancient Rome were located in full view of the public. The toilets were accessible to passersby. They were situated in a room with a round hole carved onto a stone or wooden seat. There was water flowing underneath the toilet.

After using the latrine, users cleaned up with a stick which had a sponge attached to it. Private residences also had toilets that were located close to the kitchen.

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