Which upgrade is best for a desktop-workstation customer who needs greater operating data
integrity?

A.
display

B.
memory

C.
optical disk

D.
processor

Explanation:
http://h10010.www1.hp.com/wwpc/pscmisc/vac/us/en/sm/workstations/xw4300-faq.html(What is ECC memory? Why is ECC memory important?)