On the Movie Explorer's options menu, the ____________________ option displays a document's elements.

A sequential search of an n-element list takes ____ key comparisons on average to determine whether the search item is in the list.

A. 0 B. n/2 C. n D. n2

A(n) ______ is an informal website consisting of time-stamped articles, or posts, in a diary or journal format.

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