To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series

To estimate the magnitude of a flood with a return period of T years,

1.	To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series
A.	(i) and (ii)
B.	(i),(ii) and (iii)
C.	(i), (ii) and (iv)
D.	(i), (ii), (iii) and (iv)
Answer» C. (i), (ii) and (iv)