Question no 1930 : Souce List Creation

In SAP MM ECC6.0, suggest the possible methods of maintaining the source list ?

I.     From Contract
II.    From Scheduling agreement
III.   From Purchase order
IV.   From Quotation
V.    From Purchasing info record

(only one answer)

(A)   I, II, III, IV, V
(B)   I, II, V
(C)   I, II, IV, V
(D)   I, II, IV
(E)   I, II, III
.