单项选择题

A. Coherence uses a more efficient TCMP algorithm going……

When scaling Coherence from one to two cache servers， it will not show the same scalability as two to four. Why？（）

A. Coherence uses a more efficient TCMP algorithm going from two to four cache servers
B. When going from one to two cache servers， object backups are copied across servers so work is doubled，but going from two to four is a fixed amount of work
C. Near cache is enabled with a larger quorum thus performance is improved
D. all of the above

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