What is a feature of HP Compaq Pro 6300 All-in-One PCs?

A.
form factor that saves space without sacrificing performance or productivity

B.
includes full-control HP Business Touchscreen HD Monitor

C.
includes the HP OfficeJet Pro 8600 All-in-One MFP

D.
includes an external CD drive for extra convenience and reliability

Explanation:
Reference:http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/12454-12454-64287-321860-
3892085-5272039.html?dnr=1(Features, All-in-one intelligent design, second bulleted point)