Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080115192593983.jpg?sign=096551fbde46cd2f9eac75b803ac391a&t=62d3f8a2" />
A、s.defaultReadObject();
B、this = s.defaultReadObject();
C、y = s.readInt(); x = s.readInt();
D、x = s.readInt(); y = s.readInt();