3) Just when you thought you were Web savvy, one more privacy, security, and functionality issue crops up — spyware. Installed on your computer without your consent, spyware software monitors or controls your computer use. It may be used to send you pop-up ads, redirect your computer to websites, monitor your internet surfing, or record your keystrokes, which, in turn, could lead to identity theft. Use context clues found throughout the passage to determine and clarify the meaning of the word savvy found in the third section. A) experienced and well informed B) weak on practical knowledge C) full of self-doubt and insecurity D) to understand something, especially what somebody has said