Which sentence is correct about the code below?#include <iostream>#include <algorithm>#include <vector>using namespace s

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Which sentence is correct about the code below?#include <iostream>#include <algorithm>#include <vector>using namespace std;class A {int a;public:A(int a) : a(a) {}int getA() const { return a; }void setA(int a) { this?>a = a; }/* Insert Code Here */};struct add10 { void operator()(A & a) { a.setA(a.getA() + 10); } }; int main() { int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 }; vector<A> v1(t, t + 10); for_each(v1.begin(), v1.end(), add10()); vector<A>::iterator it = find(v1.begin(), v1.end(), A(7)); cout << it?>getA() << endl; return 0;}

A. it will compile and print 7
B. it will not compile
C. it will compile but the program result is unpredictable
D. adding code: bool operator !=(const A & b) const { if (this?>a != b.a) { return true; } return false; } at Place 1 will allow the program to compile