Which of the following represents the Undo button?

Which of the following operations do bidirectional iterators have?

A. Prefix operator* to make available the container element for use as l-value or r-value. B. Overloaded operator+ to add an int value to the iterator to move the place the iterator points forward by the argument number of elements. C. Overloaded operator* to multiply the iterator by an int value to move the place the iterator points by a number of elements equal to the argument. D. Overloaded operator- to move the place the iterator points backware by a number of elements equal to the argument.

Subscript numbering in C++

A) can be set at run time. B) can begin with a programmer-defined value. C) varies from program to program. D) automatically begins with zero. E) automatically begins with one.