According to the Combined Solow-Romer Model

According to the combined Solow-Romer model,

A) all countries grow at the same rate in the long run,but actual growth rates can differ across countries for long periods of time.
B) all countries grow at the same rate in the medium and long runs.
C) all countries grow at different rates forever.
D) all countries grow at the same rate as the United States in each period.
E) all countries grow at different rates in the long run,but actual growth rates are the same across countries for long periods of time.