What does smooth movement mean when referring to the character control?

When a chart is selected the Chart Tools tabs of Design, Layout, and ________ are available

Fill in the blank(s) with correct word

What is the code for a loop that iterates from the end of a string toward the beginning?

a. string::reverse_iterator i{s.begin()}; while (i != s.end()) { cout << *i; ++i; } b. string::reverse_iterator i{s.rbegin()}; while (i != s.rend()) { cout << *i; ++i; } c. string::reverse_iterator i{s.end()}; while (i != s.begin()) { cout << *i; --i; } d. string::reverse_iterator i{s.rbegin()}; while (i != s.rend()) { cout << *i; --i; }