According to Guttmann in His Historical Analysis of Sport

According to Guttmann in his historical analysis of sport:

A) the factors he proposed to define and describe dominant sports forms today have only existed together, at the same time, in modern sports.
B) sports today are much less rationalized than in prior historical periods.
C) the tendency of individual athletes to play numerous positions in a sport is a characteristic of modern sport.
D) the influence of social privilege or higher class standing on access to sport is a major characteristic of modern sport.