Which sort algorithm does the following outline define?

The ____ function returns an array of elements that exist in one array but not in any other arrays to which it is compared.

A. array_compare() B. array_diff() C. array_search() D. array_match()

A(n) ____________________ is a Web site that features useful content but also contains links to other sites.

Fill in the blank(s) with the appropriate word(s).