What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class Complex
{
    private:
    float real;
    float imag;
    public:
    Complex():real(0), imag(0){}
    Complex operator ()(float re, float im)
    {
        real += re;
        imag += im;
        return *this;
    }
    Complex operator() (float re)
    {
        real += re;
        return *this;
    }
    void display()
    {
        cout << "(" << real << "," << imag << ")" << endl;
    }
};
int main()
{
    Complex c1, c2;
    c2 = c1(3.2, 5.3);
    c1(6.5, 2.7);
    c2(1.9);
    cout << "c2=";c1.display();
    cout << "c2=";c2.display();
    return 0;
}

A. c2=(9.7,8)
c2=(5.1,5.3)

B. c2=(9,8)
c2=(5,5)

C. c2=(4.7,8)
c2=(2.1,5.3)

D. c2=(5.7,8)
c2=(5.1,5.6)

Answer: Option A