Explanation: An EPIRB's purpose is to transmit a distress signal, immediately alerting search and rescue authorities (like the USCG via a Rescue Coordination Center or RCC) on frequencies such as 406 MHz. When an EPIRB is activated, it triggers a significant and costly search and rescue response. Therefore, if an EPIRB is accidentally activated (a false alarm), the most critical action is to *immediately notify* the nearest coast station or RCC. This communication is essential to cancel the distress alert and prevent an unnecessary and resource-intensive SAR operation. Only after informing authorities should you disable the EPIRB to stop the transmission. Disabling the EPIRB alone (A, D) is insufficient because the distress alert has already been transmitted and received, potentially initiating a response. Option B is less precise, as the primary goal is to explicitly *cancel the distress alert* by informing them, rather than requesting a specific "reset signal."