For a recreational vessel greater than 65 feet in length with a gross tonnage of 75 tons, how many 20-B portable fire extinguishers are required under 33 CFR §175.320?

Why B is correct

Per Table 4 to 33 CFR §175.320(b)(1), a recreational vessel with gross tonnage more than 50 but not more than 100 tons must carry a minimum of 2 portable 20-B fire extinguishers.