CompTIA A+ 220-902 Question G-81

A user recently purchased a new PC with a 500GB hard drive. However, they are reporting that their C Drive is only 420GB. Which of the following BEST explains this?

A. The manufacturer blocks off that 80GB so that user cannot exceed the drive space.
B. The file system is using the 80GB for tables.
C. BIOS and systems files are hidden in the 80GB.
D. A Factory Recovery Partition is using the 80GB.

Correct Answer: D