Question no 1135 : Creating Scheduling Agreement

In SAP MM, It is possible to create the Scheduling Agreement using which of the following options ?

(more the one answers)

A)      with reference to another Scheduling Agreement.
B)      with reference to RFQ/Quotation.
C)      with reference to a Purchase Order.
D)      with reference to a Contract.
E)      with reference to a Purchase Requisition.
.