In Illinois, which of the following is required by law to have a real estate license? A$.$ an employee at a wrecking company who negotiates bids and contracts for the destruction of old buildings. B$.$ a regular employee of a licensed real estate management company who manages $200$ apartments in the apartment complex where they live.C$.$ a regular employee of a property owner who collects rent. D$.$ an attorney who receives a commission on a real estate sale.