Answer:
Prostitution.
Explanation:
Prostitution is considered illegal in most parts of the United States. The state laws, instead of federal laws, constituted the act of engaging in venereal activities in return of money as illegal.
In the history of the US, the these acts of public immorality were considered to be vagrancy crime. Under the Tenth Commandment of the United States, the states have rights either to permit or prohibit these acts.
Therefore, the correct answer is prostitution.