The correct answer is D. All the above.
The Common Market for Eastern and Southern Africa (COMESA) is a regional economic bloc of 21 member states in Eastern and Southern Africa. The official languages of COMESA are English, French, and Portuguese.
English is the most widely spoken language in COMESA, with over 100 million speakers. It is the official language of 12 of the 21 member states. French is the second most widely spoken language in COMESA, with over 20 million speakers. It is the official language of 4 of the 21 member states. Portuguese is the third most widely spoken language in COMESA, with over 10 million speakers. It is the official language of 2 of the 21 member states.
The use of multiple official languages in COMESA reflects the diversity of the region. The three official languages are used in different ways in different member states. In some member states, all three languages are used equally. In other member states, one language is used more than the others. The use of multiple official languages can sometimes lead to communication problems. However, it also allows for greater participation in COMESA by people from all over the region.