Why RF exposure comes from the antenna, not the equipment box, so moving the antenna farther from people or living spaces is the most effective fix. Power density falls off with the square of the distance, so doubling the separation cuts exposure to one quarter. Other valid steps are reducing power, reducing duty cycle, or limiting transmit time, but of the choices listed only antenna relocation helps.
Watch out Moving the transmitter does nothing, because the RF energy is radiated from the antenna at the far end of the feedline, and raising the duty cycle actually increases average exposure because the transmitter is on for a larger fraction of the time.
Exposure comes from the antenna, not the radio. More distance, less power, lower duty cycle.