Question

Why did the Middle colonies have such a diverse European population? A. The Middle colonies had a policy of religious toleration. B. The Middle colonies had the richest silver mines, which attracted people from all over Europe. C. The Middle colonies were the closest to Europe of the American colonies. D. The king set limits on how many people from each country could settle in the Middle colonies.

Answer 1

The answer is "A" 
The Middle colonies tolerated the many different ethnic and religious individuals that came to their colonies.  Many of the other colonies were not tolerant and this was well known.