A customer has budget sign-off to purchase a new p5-550 2-way server to replace their aging 2-way 7025-6F0. They like the advantages of the Simultaneous Multi Processing （SMT） ability of this server. Their application is certified at AIX 5.2 and is scheduled for AIX 5.3 certification in six months. The Chief Information Officer is concerned that they will lose the budget if they do not purchase the server this fiscal year. What is the most relevant and cost-effective advice the pSeries technical specialist can offer？（）

A. Purchase a 4-way p630 to compensate for not using SM
B. Purchase the p5-550 server and install AIX 5.2， which can be upgraded to AIX 5.3 later.
C. Purchase the p5-550 server and install AIX 5.2 and enable SM
D. Suspend the purchase of a new machine at this time and upgrade the current server to a 4-way server.