The correct answer is A) conflict over the Aouzou Strip.
The Aouzou Strip is a narrow strip of land located in the northern part of Chad, along the border with Libya. This region has valuable mineral resources, including uranium, which has contributed to the ongoing boundary dispute between Chad and Libya. The dispute can be traced back to the colonial period when European powers, such as France and Italy, established boundaries that did not necessarily align with the ethnic or tribal divisions in the region. The legacy of colonialism and the arbitrary drawing of borders have created tensions and ongoing conflicts over territorial claims, as seen in the Aouzou Strip dispute between Chad and Libya.