One of the major benefits that resulted from the the alar "scandal" in 1989 was:

It banned the use of alar in the use of agricultural food products.  In this case, it was used on apples and was found to cause cancer.  Since it would endanger consumers it was banned by the Environment Protective Agency.

i believe that the answer to the question provided above is that  establishing smaller ethnic communities within larger communities  gives more chance for people to know each other more but this might lead to the  conflict between groups.

a

explanation: