Dead weight tonnage of a ship_______________?

Dead weight tonnage of a ship_______________?

i) varies with latitude and season
ii) is more than displacement tonnage
iii) is the difference between displacement load and displacement light

select the correct statemens.
A. i) and ii) are correct
B. ii) and iii) are correct
C. i) and iii) are correct
D. Only iii) is correct