The following code generates an error. Why? class School {
public:
void PrintNames();
protected:
void SetNames();
string names;
private:
string address;
};
class NewSchool : School {
public:
string GetNames();
};
int main() {
NewSchool myObject;
String str;
myObject. SetNames();
str = myObject. GetNames();
return 0;
}

a. In class NewSchool : School, the specifier is not mentioned.
b. The function myObject. SetNames() is not accessible by main().
c. The variable address is accessible by the class NewSchool.
d. The variable name is accessible by main().