Sea turtle hatchlings leaving their hatching grounds on Florida beaches reach ocean currents by swimming to the northeast, as defined by the north of the Earth' s magnetic field. Florida hatchlings placed in a large indoor tank also swim toward the northeast. But when the tank is surrounded by an artificial magnetic field twice as strong as the Earth' s field and opposite in direction, the hatchlings swim in the direction opposite to that in which they swim without the artificial magnetic field. The information in the statements above most strongly supports which one of the following?
A: If a sea turtle hatches on the coast of Africa, it will swim toward the southwest.
B: Once baby sea turtles reach the open sea, they join groups of adults in the North Atlantic.
C: Baby sea turtles are able to sense the magnetic field of the Earth.
D: The direction in which ocean currents flow is determined by the magnetic field of the Earth.
Choose A, B, C or D as your solution.
C