Beginning in 2011, Yemen was drawn into a civil war because of: O A. Yemeni hostages being taken in Iran. B. an American military invasion of the country. C. territory being seized by ISIS terrorists. O D. conflicts between Sunni and Shiite Muslims.​

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.

The answer to the question is a.