Question

the national geographic findings on the sinking of the maine were mostly based on
the testimony of divers
advanced computer modeling.
new eyewitness reports.
a review of old evidence.

Explanation:

To determine the correct answer, we analyze the options. The National Geographic's investigation into the sinking of the Maine likely involved re - examining existing (old) evidence rather than relying on new divers' testimony (as diving technology for such historical investigations might not be the primary source), advanced computer modeling (which is more modern and less likely for this historical event's re - evaluation), or new eyewitness reports (since the event is historical and new eyewitnesses would be rare). So the most probable basis is a review of old evidence.

Answer:

D. a review of old evidence.