Research with Both Non-Incestuous Pedophiles and Perpetrators of Incest (Marshall

Research with both non-incestuous pedophiles and perpetrators of incest (Marshall et al.,1986 and Marshall,1997) suggests that

A) non-incestuous pedophilia is generally influenced by paraphilia, where incest may be more opportunistic.
B) incest is generally influenced by paraphilia, where non-incestuous pedophilia may be more opportunistic.
C) both behaviors tend to be motivated by paraphilia.
D) both behaviors tend to be motivated by opportunistic individuals rather than by paraphilia.