In the Automotive Industry, a Lot of Innovations Emerged Between

In the automotive industry, a lot of innovations emerged between 1890 and 1912. Thereafter, a dominant design emerged. How can we tell?

A) There was a notable increase in the number of rivals and the intensity of competition
B) There was rapid growth
C) There was a gradual elimination of alternative fundamental designs
D) There was an increase in the size of the average European car, and a decrease in the size of the average American car