Which statement reflects a predisposing social norm likely to increase risky behavior participation?

The statement that "Everyone is participating in it" reflects a predisposing social norm that likely increases participation in risky behaviors. When individuals perceive that risky behaviors are being commonly accepted or actively engaged in by their peers or social group, they may feel a pressure to conform. The normalization of such behaviors can diminish the perception of risk associated with them and make individuals, especially adolescents, more likely to engage in those behaviors themselves.

In contrast, perceptions of disapproval from influential figures like parents or educators, as suggested in the other options, tend to discourage individuals from engaging in risky activities. Statements highlighting community disapproval or conversations about avoiding risks contribute to a protective environment rather than a risky one. Therefore, the prevalence of participation among peers serves as a powerful motivator, leading to an increased likelihood of involvement in those behaviors.