Answer:
 Common courtesy 
Step-by-step explanation:
What prohibits you from increasing your speed until the vehicle that is passing you has completed the passing maneuver? 
 Florida law 
 Common courtesy 
 Nothing 
 Right-of-way laws
Though it is illegal in Florida to increase your speed until a vehicle passing you has completed its maneuver, However, common courtesy in driving requires a driver to be polite enough to allow a car that is passing by to complete its passing maneuver before increasing speed so as to avoid accidents.