Paragraph 10 Nigeria’s over 200 million-strong population comprises a middle class that ranks among the world’s most migrated. There are Nigerian populations in many parts of the world, owing to the country’s infrastructural challenges and high level of unemployment. Artists are not exempt from this exodus, although success can give them the means to return home. The logical connector/discourse marker "owing to" in paragraph 10 (quoted above) is used to indicate _________ .

A. comparison
B. contrast
C. order
D. addition of information
E. cause and effect

E. cause and effect

The phrase "owing to" is used to show the reason or cause of something, indicating a cause and effect relationship. In this context, it explains why there are Nigerian populations in many parts of the world - because of the country's infrastructural challenges and high levels of unemployment.