A customer has a large UNIX environment and has engaged a pSeries technical specialist to work on a solution with them.  Which of the following statements would best establish UNIX credibility with a knowledgeable customer？（）

A.The technical support specialist has completed a UNIX course at college.

B.The technical specialist has supported several similar projects and has earned an IBM AIX certification.

C.The technical support specialist’s company sells $3M of UNIX computer systems every year.

D.The technical support specialist has sold and installed at least a dozen Apple and iSeries systems with POWER processors.