Under 46 CFR §199.150, the structural attachment of a launching appliance to the vessel must be designed so that its ultimate strength is at least how many times the load imparted by the appliance and its fully loaded survival craft under the most adverse combination of list and trim?

Why D is correct

46 CFR §199.150(e) requires each launching appliance's structural attachment to be designed, based on the ultimate strength of the construction material, to be at least 4.5 times the load imparted by the launching appliance and its fully loaded survival craft under the most adverse combination of list and trim specified in §199.150(c).