The correct answer is D. All of the above.
The six official working languages of the United Nations are Arabic, Chinese, English, French, Russian, and Spanish. These languages are used in all official UN documents and meetings.
Arabic is the official language of 26 countries in the Middle East and North Africa. It is also spoken by significant populations in other countries, such as Chad, Niger, and Sudan.
Chinese is the official language of China and Taiwan. It is also spoken by significant populations in other countries, such as Singapore, Malaysia, and Indonesia.
English is the official language of the United Kingdom, the United States, Canada, Australia, New Zealand, and Ireland. It is also spoken by significant populations in other countries, such as India, Pakistan, and Nigeria.
French is the official language of France, Belgium, Switzerland, Canada, and many countries in Africa.
Russian is the official language of Russia and Belarus. It is also spoken by significant populations in other countries, such as Ukraine, Kazakhstan, and Uzbekistan.
Spanish is the official language of Spain, Mexico, Argentina, Colombia, Chile, and many other countries in Latin America.
The UN uses six official languages to ensure that all member states can participate fully in its work. This is important because the UN is an organization that represents all countries in the world.