9. All persons who are assigned duty as officer in charge of a watch or as a rating formingpart of a watch and those whose duties involve designated safety, prevention of pollution andsecurity duties shall be provided with a rest period of not less than:a minimum of 10 hours of restin any 24-hour period; and77 hours in any 7-day period.The hours of rest may be divided into nomore than two periods, one of which shall be at least 6 hours in length, and the intervals betweenconsecutive periods of rest shall not exceed 14 hours.Parties may allow exceptions from therequired hours of rest in paragraphs mentioned above provided that the rest period is not less than70 hours in any 7-day period. 正常狀況下，休息時間可以分段，但不能超過幾個時段？
(A) 2個時段
(B) 3個時段
(C) 6個時段
(D) 7個時段