The group of countries that produce most of the cocoa in West Africa is

The question is asking which group of countries in West Africa produces the most cocoa.

Cocoa is a crop that is used to make chocolate, and West Africa is one of the major regions in the world where cocoa is grown.

Option A includes Ghana, Sierra Leone, and Gambia. Sierra Leone and Gambia do produce cocoa, but they are not among the top cocoa-producing countries in West Africa.

Option B includes Ghana, Cote d'Ivoire, and Republic of Benin. Cote d'Ivoire is the largest cocoa producer in the world, and Ghana is also a major cocoa producer. Republic of Benin does produce cocoa, but it is not as significant as the other two countries.

Option C includes Ghana, Nigeria, and Cote d'Ivoire. Ghana and Cote d'Ivoire are indeed the top cocoa-producing countries in West Africa. Nigeria also produces cocoa, but it is not as significant as the other two countries.

Option D includes Nigeria, Cote d'Ivoire, and Togo. Nigeria and Cote d'Ivoire are major cocoa producers, but Togo is not among the top cocoa-producing countries in West Africa.

Therefore, the correct answer is Option C: Ghana, Nigeria, and Cote d'Ivoire. These three countries are the main cocoa producers in West Africa.