A navigator plots a true course of 210° on the chart. Variation is 5°W and deviation is 2°E for the intended heading. What compass course should the helmsman steer?

Why C is correct

Converting true to compass (uncorrecting) reverses the T-V-M-D-C sequence: add westerly and subtract easterly. True 210° + 5°W variation = Magnetic 215°; Magnetic 215° − 2°E deviation = Compass 213°. When uncorrecting from true toward compass, westerly errors are added and easterly errors are subtracted.