无论采用何种方法，估计提早行权时不需考虑的因素是（）

A.等待期的长度

B.预计将发行在外的类似期权的平均存续时间

C.基础股份的价格

D.基础股份的预计波动率

A recipe for soda requires ω liters of water for every liter of syrup. If soda is made according to this recipe using rn liters of syrup, and sold for j dollars a litter, what will be the gross profit if syrup costs k dollars a liter and water costs nothing
(A) m(ω+k)
(C) m(jω-k)
(D) (j-k)m
(E) jm(1+ω)-km