【单选题】
已知各期环比增长速度为7.1%、3.4%、3.6%、5.3%，则定基增长速度是
①
7.1%*3.4%*3.6%*5.3%
②
(7.1%*3.4%*3.6%*5.3%)-1
③
107.1%*103.4%*103.6%*105.3%
④
(107.1%*103.4%*103.6%*105.3%)-1