A ________ chart is generally used for showing the relationship of the parts to the whole

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());

What data type must be used as an array index?

What will be an ideal response?