When Bueno De Mesquita Et Al

When Bueno de Mesquita et al.compared the economic growth rates of hundreds of democratic and autocratic governments during the last half of the 20^th century,they found that

A) the autocratic governments had a slightly higher growth rate.
B) for most of that time democratic regimes had a faster economic growth rate, but in the last decade of the century autocratic regimes had much faster growth.
C) the most democratic administrations had far greater economic growth than the most autocratic ones.
D) the democratic administrations grew more rapidly in Latin America, but less rapidly than the autocratic governments in Asia.
E) there was no obvious pattern.