LGB adolescents are more likely than heterosexual youth to experience depression, substance abuse ...

LGB adolescents are more likely than heterosexual youth to experience depression, substance abuse and suicide attempts. Which of the following offers the MOST likely explanation for this?
 
  A) Negative societal attitudes toward homosexuality and sexuality in general.
  B) Societal reinforcement of heterosexual adolescent sexuality, which leaves out gay and lesbian adolescents.
  C) Same-gender behavior is dysfunctional in adolescence and should not be explored until adulthood.
  D) Same-gender sexual behavior itself is inherently dysfunctional at any age.