单项选择题

棱镜度2.00~10.00∆垂直棱镜国标允差是()

A.±(0.65+0.05×Smas)∆
B.±(0.50+0.05×Smas)∆
C.±(0.37+0.05×Smas)∆
D.±(0.25+0.05×Smas)∆