Final answer:
VHF-DSC stands for Very High Frequency - Distress Signal Channel in the context of maritime communication systems. The correct answer is A.
Step-by-step explanation:
The correct answer is A. Very High Frequency - Distress Signal Channel. VHF-DSC refers to Very High Frequency - Digital Selective Calling, which is a maritime communication system used for distress signaling and general communications between ships and shore stations. VHF refers to the range of frequencies used, which is typically between 156 and 174 MHz.