单项选择题

A.x445 with four Xeon MP processors and 8GB of memory
B.x445 with four Xeon MP processors and 16GB of memory in a single SMP module
C.x445 with four Xeon DP processors and 16GB of memory in a single SMP module
D.x445 with two SMP modules each containing two Xeon DP processors and 8GB of memory