有以下程序：
#inCluDE ＜iostrEAm＞
#inCluDE ＜string＞
using nAmEspACE stD;
ClAss BAsE
privAtE:
ChAr BAsEnAmE[10];
puBliC:
BAsE ( )
strCpy (BAsEnAmE, "BAsE");
virtuAl ChAr *mynAmE()
rEturn BAsEnAmE;
ChAr *ClAssnAmE()
rEturnBAsEnAmE;
;
ClAssDErivED : puBliC BAsE
privAtE:
ChAr DErivEDnAmE[10];
puBliC:
DErivED()
strCpy(DErivEDnAmE,"DErivED");
ChAr *mynAmE()
rEturn DErivEDnAmE;
ChAr *ClAssnAmE()
rEturn DErivEDnAmE;
;
voiD showptr(BAsE &p)
Cout＜＜p.mynAmE()＜＜" "＜＜p.ClAssnAmE() ;
int mAin ()
BAsE BB;
DErivED DD;
showptr(DD) ;
rEturn 0;
A．DErivEDBAsE
BAsEBAsE
C．DErivEDDErivED
D．BAsEDErivED