Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean. In determining factors that influence sea turtle migration, the exploration phase might include . a. using tracking devices to follow migration patterns. b. performing statistical analyses of experimental results. c. testing the influence of light and ocean current on migration. d. publishing experimental results in a journal where studies are reviewed by other experts in the field.