An unmanned ocean vehicle named Nereus traveled 35,768 feet below the surface of the ocean. Another vehicle traveled 17,652 feet below the surface.

About how much farther below the ocean’s surface did Nereus travel than the other vehicle?
Round each number to the nearest thousand.

A.
17000 ft

B.
18,000 ft

C.
18,100 ft

D.
20,100 ft