Under 46 CFR §111.25-15, a motor driving a direct-acting windlass must carry a minimum short-time rating of how long?

Why C is correct

Table 111.25-15 specifies a minimum short-time rating of one-fourth hour for a direct-acting windlass motor. A windlass with hydraulic transmission has a different, more complex duty cycle requirement; one-half hour applies to deck winches and direct-acting capstans; continuous duty is the default for motors not listed in the table.