单项选择题

A.2.50/2.75/3.00/3.50/4.00
B.2.25/2.50/2.75/3.00/3.50/4.00
C.2.25/2.50/2.75/3.00/3.25/3.50/4.00
D.2.25/2.50/2.75/3.00/3.25/3.50/3.75/4.00