單項選擇題給出下面的代碼段:public class Base{intw,x,y,z;public Base(inta,intb){x=a;y=b;}public Base(inta,intb,intc,intd){//assignmentx=a,y=bw=d;z=c;}}在代碼說明//assignmentx=a,y=b處寫入如下哪個代碼是正確的?()

A.Base(a,b)
B.x=a,y=b
C.super(a,b)
D.this(a,b)


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