$28\mathrm{.}0\%$ complete

Question

How does a search engine work?

A$.$A search engine usually works by compiling a database of information about web pages.

B$.$A search engine usually works by searching a web cache in real$-$time to get the most current results.

C$.$A search engine accesses a collection of web pages and downloads them to your computer for viewing.

D$.$A search engine usually works by compiling a group of web pages and bookmarking them in your local cache for quick access.