What constitutes sexual harassment?

C is the correct answer because sexual harassment is defined as unwelcome sexual advances or conduct that affects an individual's employment decisions, creates a hostile work environment, or interferes with their work performance. This encompasses a range of behaviors, including inappropriate comments, unwanted touching, or any form of sexual attention that is not reciprocated. The emphasis on "unwelcome" is critical in distinguishing sexual harassment from consensual interactions, as it highlights that the key factor is the lack of consent from the recipient.

The other choices do not accurately reflect the definition of sexual harassment in a professional context. Advertisements promoting inappropriate conduct do not directly address sexual harassment as experienced by individuals in the workplace. Consensual romantic relationships, while potentially problematic under certain circumstances, do not constitute harassment since they involve mutual agreement. Communication in a professional environment is also a broad and neutral term that does not imply any form of harassment unless that communication is unwelcome and of a sexual nature.