问题如下：
Analysts collected some information:
According to basic fundamental law, please calculate the number of independent decisions made per year:
选项：
A. 1.56
B. 1.2
C. 1.74
解释：
C is correct.
考点：考察basic fundamental law 的公式：IR=IC*√BR
解析：这个题是已经给了IR和IC，TC是干扰项。 直接代入公式：
BR=(0.66/0.5)2=1.74
ir=ic× tc× √br，为啥不用tc?
