Which of the following is a continuing problem in Nigeria? a. economic dependence on a single agricultural crop b. religious tensions between Christians and Muslims c. disagreements between fundamentalist Muslims and the secular government d. severe famine conditions caused by a prolonged drought

 b. religious tensions between Christians and Muslims.

Nigeria has a long history of religious tensions between its Christian and Muslim populations, often leading to violence and the disruption of social harmony. Historically, the northern part of Nigeria is predominantly Muslim, while the southern part is predominantly Christian, and this religious divide has been a source of conflict, particularly where these populations overlap.

These religious tensions are exacerbated by ethnic differences, economic disparities, and political contestation, making it a complex and enduring problem for the nation's stability and development. Although each of the options listed can be a challenge for Nigeria, religious tension is a continual and significant issue impacting the country at various levels, from local communities to national politics.