What is the primary difference between exponential and linear functions?

A: The growth of an exponential function is proportional to the previous growth while the growth of a linear function is constant.

B:The growth of a linear function is proportional to the previous growth while the growth of an exponential
function is constant.

C:The growth of a linear function is proportional to the previous growth while the growth of an exponential
function is proportional to the quadratic growth.

D:The growth of an exponential function is proportional to the quadratic growth while the growth of a linear function is constant.