Accessing derived class attributes from vector of parent class object pointers [duplicate]

I have a class A, with derived classes B & C.

Using a vector, defined as storing pointers to objects of class A, I'm storing pointers to some objects of class B, and some objects of class C.

When I address a pointer to an object, from the vector, how can I access class B or C specific attributes?

Currently, as the vector is defined as storing pointers to objects of class A, I can only access base class attributes.

Example:

#include <iostream>
#include <vector>

using namespace std;

class A {
public:
    int ID;

    A(int ID)
    : ID(ID) {}
};

class B: public A{
public:
    int price;

    B(int ID, int price)
    : A(ID), price(price) {}
};

class C: public A{
public:
    int weight;
    
    C(int ID, int weight)
    : A(ID), weight(weight) {}
};

int main() {

    B * objB = new B(1, 1);
    C * objC = new C(1, 100);
    
    vector<A *> objVector;
    objVector.push_back(objB);
    objVector.push_back(objC);
    
    //How do I access weight here?
    int accessedWeight = objVector[1]->weight;

    return 0;
}