Answer- D
Victor 6000 is a French robot that was involved in rescue operation of the Titan submersible. It is capable of diving up to 20,000 feet (6,000 metres) underwater.
The crew of the Titan submersible lost contact with its surface vessel – the Polar Prince – an hour and 45 minutes after it began a dive to see the wreck.
French research vessel L’Atalante, was carrying the Victor 6000 remotely operated vehicle (ROV).
Hence, option 'D' is correct.