Imagine a Country with an Ethnically Heterogeneous Population

Imagine a country with an ethnically heterogeneous population. The different ethnic groups are geographically clustered so that if you consider particular areas of the country in isolation, they have relatively homogeneous populations. If such a country were to adopt a federal system, which type of federalism would you expect it to adopt?

A) congruent and symmetric
B) congruent and asymmetric
C) incongruent and symmetric
D) incongruent and asymmetric