A part has been MT yoke inspected in the shop and is subjected to demagnetiz ation after testing per MT -1. A reading of 4 gauss is noted after the demagnetiz ation process. What action should the technician take? a. Demagnetize the part again until the value is less than 0. b. Demagnetize the part again until the value is 3 gauss or less. c. Re-magnetize the part in the opposite direction to cancel the field. and then demagnetize the part again until the value is less than 2 gauss. d. Demagnetize the part again until the value is I gauss or less.