A Phenomenon Known as Moore's Law Says That

A phenomenon known as Moore's law says that:

A) computing capacity doubles every two years.
B) physical capital doubles every two years in countries with high rates of growth.
C) the time it takes a country to double its income level can be calculated by dividing 70 by the growth rate.
D) the time it takes a country to double its productive capacity can be calculated by dividing 70 by the growth rate.