To become a theory, a hypothesis must first become a law.
O be proven true only once.
originate with a well-established scientist.
have numerous experiments consistently prove it true.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

the correct option is option d