假如下行频率为2127.4MHz,通过计算可得到EARFCN是否为174？（）

A.centralized？management？for？autonomous？access？points
B.centralized？management？for？lightweight？access？points
C.centralized？management？that？requires？an？external？AAA？server
D.centralized？management？with？integrated？AAA？server
E.integration？with？the？Location？Appliance？to？expand？real？time？tracking？to？1500？devices？for？30？days
F.integration？with？the？Location？Appliance？to？expand？real？time？tracking？to？2500？devices？for？30？days