Some Puerto Ricans leave the mainland and return to the island ...

[asmith134]

Some Puerto Ricans leave the mainland and return to the island because
 
  a. circular migration is very common for Puerto Ricans.
  b. economic recessions along with deteriorating neighborhoods on the mainland
  encourage them to return.
   c. recent tax incentives have brought more businesses to Puerto Rico increasing job
  opportunities.
   d. poverty rates and unemployment on the island are much lower.

Question 2

Today,
 
  a. just over one million Puerto Ricans live on the mainland.
   b. fewer than one million Puerto Ricans live on the mainland.
  c. Puerto Ricans make up about nine percent of all Latinos on the mainland.
   d. fewer Puerto Ricans live on the mainland than in Puerto Rico.

[sailorcrescent]

Answer to Question 1

b. economic recessions along with deteriorating neighborhoods on the mainland
encourage them to return.

Answer to Question 2

c. Puerto Ricans make up about nine percent of all Latinos on the mainland.

[asmith134]

Excellent

[milbourne11]

Great answer, keep it coming