Under 46 CFR §11.329, an applicant seeking an STCW OICEW endorsement via the 36-month seagoing service path must demonstrate that at least how many months of that service consisted of engine room watchkeeping duties under the supervision of a qualified engineer officer?

Why C is correct

46 CFR §11.329(a)(2) requires the applicant to provide evidence of having performed engine room watchkeeping duties under the supervision of an officer holding the STCW endorsement as chief engineer officer or qualified engineer officer for a period of not less than 6 months during the required seagoing service.