An A+ Certified Technician MUST do an install on a Windows XP system from the distribution CD. However， the system does not boot from this CD. What is the MOST likely cause of this problem？（）

• A、The CD is defective.
• B、The CD is not bootable.
• C、The CD-ROM drive is defective.
• D、The Boot Sequence is not set in the BIOS to boot first from the CD