Which of the following describes something as crass?

Describing something as crass indicates that it is crude and lacking in sensitivity or refinement. It often refers to behavior, remarks, or attitudes that are insensitive, unrefined, or lacking in social grace or good manners. The term can be used to characterize language or actions that are considered vulgar or rude, showing a disregard for the feelings or sensibilities of others.

In this context, a response that aligns with the definition of crass would focus on the lack of polish or tact in one's demeanor or communication. Consequently, the description that accurately reflects this negative assessment of social behavior is the one that indicates a crude nature and absence of manners.