Final answer:
b. Sonar technology was invented after the Titanic disaster to help prevent similar accidents.
Step-by-step explanation:
After the Titanic disaster, technology was invented to help prevent similar accidents in the future. One such technology is b. sonar.
Sonar uses sound waves to detect objects underwater and is effective in spotting and locating large objects such as ships or large pieces of airplanes. However, it is not able to resolve smaller objects or detect detailed shapes of objects.