Which of the Following Statements Produces the Same Results as the Statement

Multiple Choice

Which of the following statements produces the same results as the statement: std::copy(v1.begin() , v1.end() , v2.begin() ) ;
If v1 and v2 are both 10-element vectors?

A) std::copy_backward(v1.begin() , v1.end() , v2.begin() ) ;
B) std::copy_backward(v2.begin() , v2.end() , v1.begin() ) ;
C) std::copy_backward(v1.begin() , v1.end() , v2.end() ) ;
D) std::copy_backward(v2.begin() , v2.end() , v1.end() ) ;