Jennifer Recently Bought a New Computer to Type a New

Multiple Choice

Jennifer recently bought a new computer to type a new manuscript she's been working on.She also stored a lot of movies on it to watch during her free time.Though the performance was good at the beginning,it deteriorated quickly over a small period of time.Which of these is the most likely cause?

A) Declining free space on the hard drive
B) Declining clock speed of the core processor
C) Fault plug-n-play devices like USB flash drives
D) Dysfunctional AC adapter