To help human readers understand why a method's statements are there, good programmers insert explanatory ____ into their methods.

Match the home entertainment center device to its function:

I. HDTV II. DVR III. Blu-ray disc IV. digital audio system V. interactive game player A. used to record television programs for viewing at a later time B. newer television broadcast of digital images with more lines of pixels C. uses digital signals sent from handheld input devices to the computer D. uses digital signals for sound E. dominant new standard for recording HD video

A virus scanner is running on a computer and scans all files currently in use. Why should a full scan be performed periodically?

A. Files not accessed recently may contain a virus. B. A full scan optimizes all files on the hard drive. C. A full scan resets the archive bit on the file. D. Active antivirus software only scans the C:\WINDOWS directory.