What is wrong with this code?

```
class Person
{
private:
string name;
string address;
public:
People();
void SetName(string n);
void SetAddress(string a);
};

```

A. The constructor has not initialized its variables.
B. There is no constructor.
C. Variables are passed into the set functions but nothing is returned.
D. None of the above.

B. There is no constructor.