Question no 1310 : MM Quotation

In SAP MM Purchasing, which of the following is only unique in the RFQ/Quotation and not other Purchasing Documents ?

(only one answer)

A)    Requirement Tracking Number.
B)     Info Update Indicator (A, B, C).
C)     Collective Number.
D)     Validity Period at the item pricing conditions.
E)     The Document type allows both internal and external number range.
.