If a person knowingly agrees to receive a fee for engaging in sexual conduct, what crime have they committed?

The correct answer is B, as engaging in sexual conduct for a fee directly aligns with the legal definition of prostitution. Prostitution is defined as the exchange of sexual acts for money or other forms of compensation, and if an individual knowingly agrees to participate in this exchange, they are committing the crime of prostitution. This offense is primarily focused on the act of engaging in sexual conduct with the intent to receive payment.

While immorality may suggest a lack of ethical or moral conduct, it does not specifically denote a legal offense in the same way that prostitution does. Solicitation refers to the act of enticing or requesting another person to engage in illegal activity, which can sometimes be related but does not directly describe the act of receiving a fee. Sexual exploitation typically involves exploiting a person's situation for sexual purposes, often linked to abuse of power or trust, and is also distinct from the straightforward act of prostitution. In this context, the clear definition and implications of B make it the accurate choice.