Question no 2780 : Pre-requisites for MRP Run

In SAP MM or PP Planning as at ECC6.0 EhP6, which of the following are per-requisites for MRP Run ?

(more than one answers) 

A)   A valid MRP type in the Material Master.
B)   A valid Material status in the Material Master.
C)   Plant parameter was created.
D)   Plant was activated for MRP run.
E)   MRP Area was activated for MRP run.
.