During ARQ communications, A Coast station will likely break the phased radio connection:

Correct Answer: Option C — If either a) or b) takes place

Coast stations are programmed to automatically terminate an ARQ link if the connection quality degrades below a threshold, indicated by excessive repeat requests (ARQs). Additionally, if the operator manually interrupts the automated answerback sequence with keyboard input, the system detects a protocol violation and drops the connection to protect the integrity of the link.