Correct option is D
The deep-sea submersible named Titan, operated by OceanGate Expeditions, tragically imploded in June 2023 during a mission to visit the Titanic wreck. This accident led to the loss of all five people on board. The Titan submersible was designed for deep-sea exploration, specifically targeting wrecks like the Titanic, located around 12,500 feet below sea level.