A person is guilty of promoting a sexual performance by a minor when, knowing the character and content thereof, he produces, directs or promotes any performance which includes sexual conduct by a minor. (2) Promoting a sexual performance by a minor is: (a) A Class C felony if the minor involved in the sexual performance is less than eighteen (18) years old at the time the minor engages in the prohibited activity; (b) A Class B felony if the minor involved in the sexual performance is less than