Assuming that the recommended hatch loading sequence is followed, how many long tons of iron ore may be loaded through hatch No. 23 while using a single belt loader to arrive at a desired mean keel draft of 28'-0"? (Use the Guidance Manual for Loading M.V. GRAND HAVEN.)

A
2930 tons
B
3110 tons
C
3170 tons
D
3240 tons
E