Answer Happy

What happens when you attempt to compile and run the following code?#include <deque>#include <iostream>#include <algorithm>using namespace std;template<class T>struct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out<<val<<" "; } }; struct Sequence { int start;Sequence(int start):start(start){}int operator()() {return 10*(1+(start++ %3));}};int main() {deque<int> d1(10);generate(d1.begin(), d1.end(), Sequence(1));sort(d1.begin(), d1.end());pair<deque<int>::iterator, deque<int>::iterator > result = equal_range(d1.begin(), d1.end(),20);for_each(result.first, result.second, Out<int>(cout));cout<<endl; return 0;}Program outputs:

A. 10 10 10 20 20 20 20 30 30 30
B. 20 20 20 20
C. 10 20 20 20 20
D. 20 20 20 20 30 E. 10 20 20 20 20 30