The correct answer is B. The citizens did not identify themselves by their ethnicity as did the rest of the country.
Step-by-step explanation:
Sarajevo is one of the largest cities of Bosnia and Herzegovina, a country that is located in Southeastern Europe. This city has always been particular, nowadays Sarajevo is the capital of the country and became during the last centuries in a city where different religious and ethnic influence took place at the same time, which made the people of Sarajevo avoid identifying with one ethnicity or religion as in the rest of the country. Also, during the 20th century Sarajevo the assassination of Archduke Franz Ferdinand took place, which began the first World War and during both wars the city changed in important ways, including the reconstruction and expansion of the city.
Considering this, from the options given it can be concluded Sarajevo was and is unique in Bosnia because "the citizens did not identify themselves by their ethnicity as did the rest of the country" as a result of multiple historical processes that had made this city quite diverse, which means there is no one unified identity.