The original members of the Bank of Central African States (BEAC) are Cameroon, Central African Republic, Chad, Republic of Congo, and Gabon. These five countries founded the bank in 1973 and established the Central African CFA franc monetary union. Option A mentions Cameroon and CAR, Option B mentions Chad and Congo, Option C mentions Gabon, and Option D (All of the above) correctly includes all five founding members. Option D is the correct answer.