Why did the middle colonies have such a diverse european population?

a. the middle colonies had the richest silver mines, which attracted people from all over europe.
b. the king set limits on how many people from each country could settle in the middle colonies.
c. the middle colonies had a policy of religious toleration.
d. the middle colonies were the closest to europe of the american colonies.

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.