What challenge did the united states face that Britain did not while industrializing ? A. Political Instability
B. smaller population
C. Lack of Uniformity
D. Large Geographical Size

It is political stability.

Explanation:

Most would say lack of uniformity. But its not. Smaller population was not the issue and large geographical size doesn't make sense.

adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.