Traceability en s u res solu tion s' confor m a nce to req uiremen t s a n d to assist in scope a n d ch a nge m a n agemen t. Wh a t types of traceabilities ca n be perfor med?
选项：

A:Derivation a n d allocation. cost a n d location
B:Relation s hip to ot her req uiremen t s , relation s hip to spon sors hip
C:Forwards a n d backwards, cost a n d location
D:Derivation a n d allocation, relation s hip to ot her req uiremen t s