Youhaveamasterpagecustom.master...ucreateanested.masterpageusingit...andthenuhavecontentpagethatusesthenested.masterasitsmasterpage...togetastringpropfromcustom.masterintoalabelincontentpagethecodeuwuduse（）A.master.masterB.parent.masterC.this.masterD.unkn
题目
Youhaveamasterpagecustom.master...ucreateanested.masterpageusingit...andthenuhavecontentpagethatusesthenested.masterasitsmasterpage...togetastringpropfromcustom.masterintoalabelincontentpagethecodeuwuduse（）
A.master.master
B.parent.master
C.this.master
D.unknown