Final answer:
Strigilēs, unguentum, and tepidarium are associated with public bathing in ancient Rome, which contrasts with other spectacles such as gladiatorial fights and chariot racing.
Step-by-step explanation:
The common Roman activity associated with strigilēs, unguentum, and tepidarium is B) public bathing. These terms relate to the bathing process and facilities associated with the Roman baths. Strigilēs were scraping tools used by bathers to clean their skin from oil and dirt, unguentum refers to the scented oils applied to the body, and tepidarium was a warm room in the Roman baths, part of the bathing ritual which also included the frigidarium (cold room) and caldarium (hot room).
Public baths were an essential part of social and cultural life in ancient Rome, where individuals not only cleansed themselves but also socialized and conducted business, contrasting with other Roman spectacles like gladiatorial fights, chariot racing, and stage productions.