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());

c. std::copy_backward(v1.begin(), v1.end(), v2.end());