What was the first manned vehicle to reach the bottom of the Marianas Trench?
| Options: |
| A) Kaiko B) Deepsea Challenger C) bathyscaphe Trieste D) Nereus |
| Answer : bathyscaphe Trieste |
| Options: |
| A) Kaiko B) Deepsea Challenger C) bathyscaphe Trieste D) Nereus |
| Answer : bathyscaphe Trieste |