The adjacency matrix for an undirected graph is symmetrical.

The Help and Support home button in the Windows Help and Search function in Windows 7 resembles a(n):

A) book. B) question mark. C) adult helping a child with a book. D) house.

A(n) ____________________ file is just as beautiful as a non-optimized file; it's just a smaller file size.

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