The correct answer is A. Petroleum
Step-by-step explanation:
Brunei is a country located in the Southeast of the Asiatic continent, this nation is part of Borneo island, this was first inhabited around the 7th century as the territory was part of the Srivijaya Empire, also, from this time Brueni had evolved greatly and nowadays is one of the most developed Asiatic countries. In terms of economy, Brunei relies mainly on the exploitation and export of petroleum and natural gas, indeed, Brunei is one of the largest petroleum producers in Asia and the world. Also, due to this, products such as food, electrical products are imported from other countries. Thus, it is petroleum Brunei greatest export.