The correct answer is A) unsatisfactory, deballast to survival draft. The key factors here are the full period of motion (7 seconds) and the maximum pitch angle (4°). According to industry standards and regulations, the motion of the vessel is considered unsatisfactory if the full period of motion exceeds 6 seconds and the maximum pitch angle exceeds 3°. In this case, with a 7-second period and 4° pitch angle, the motion is deemed unsatisfactory. The appropriate action is to deballast the vessel to its survival draft in order to reduce the vessel's motion and bring it within acceptable limits. The other answer choices are incorrect because B) and D) suggest the motion is satisfactory, which is not the case, and C) recommends placing the setback in the pipe racks, which is not the appropriate action for this situation.