(a). Algeria and Morocco
(b). Botswana and Namibia
(c). Côte d’Ivoire and Ghana
(d). Madagascar and Mozambique
Explanation:
Côte d'Ivoire and Ghana are the world's two largest cocoa producers, accounting for nearly 60% of the world's cocoa production:
Côte d'Ivoire: The world's largest producer of cocoa
Ghana: The second largest producer of cocoa, contributing to 25% of global cocoa production
Together, these two West African nations are responsible for the majority of the world's cocoa supply.
Therefore, the correct answer is (c).