How Many Seconds Would It Take an Echo Sounder's Ping

How many seconds would it take an echo sounder's ping to make the trip from a ship to the Challenger Deep (10,994 meters) and back? Recall that depth = 1/2 (1500 m/sec × Echo travel time) .

A) 0) 1466 seconds
B) 1) 466 seconds
C) 14.66 seconds
D) 146.6 seconds