How many public members does an object of class D have?

Consider the class inheritance.
```
class B
{
public:
B();
B(int nn);
void f();
void g();
private:
int n;
};
class D: public B
{
public:
D(int nn, double dd);
void h();
private:
double d;
};
```

a) 0
b) 1
c) 2
d) 3
e) 4
f) 5

e) 4

With public inheritance, public members of the base class become public members of the derived class.