Derivation of Thiem's formula Q = 2 (s1 - s2)/2.3 log10 (r2/r1) is based on the assumption
(A) The aquifer is homogeneous, isotropic and of infinite depth and area
(B) The well is sunk through the full depth of the aquifer
(C) The flow lines are radial and horizontal, and the flow is laminar
(D) All the above