________ are enabled by default and are quick short gestures either in a vertical or horizontal direction that either scroll up and down or move forward or backward a page

How do metasearch engines work?

A) They operate in a Boolean string. B) They use wild cards, extensively. C) They suggest alternative search terms. D) They search other search engines' results.

All of the following are true for both recursion and iteration except ________.

a. they have a base case. b. they can cause infinite loops or infinite recursion. c. they are based on a control statement. d. both gradually approach termination.