Answer:
Difficulty of exercising control of a government from a distance
Step-by-step explanation:
The North American coloniers had a great degree of political independence, and economic independence. The British govenrment only had a very limited control over colonial affairs, not only because of distance, but also because of choice by british officials.
This made the colonies places were there was a lot of economic freedom, and it has been shown throughout history that economic freedom helps economic development.