Is this a question with multiple options?
The ocean floor remains largely uncharted due to the difficulty of accessibility without appropriate equipment.
The answer is C. San Francisco. Explanation: The San Andreas and Hayward faults, which are in proximity, generate significant tectonic activity in this area. Consequently, regions near these faults are more susceptible to tsunamis caused by the displacement of the ocean floor during earthquakes. Additionally, many islands and bays previously established are also periodically affected.
