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.