In 2014, the per capita GDP of the five richest countries was 70 times higher than that of the five poorest, i.e. y rich/y poor = 70. if Ak^1/3 and (k rich/k poor)^1/3 = 5, then the ratio of TFPs across countries, Ārich /Apoor' , to explain income differences is
A. 1
B. 5
C. 14
D. 48
E. 77
