Which South African city is a regional hub of commerce and has South Africa's premier international airport?

A. Johannesburg

B. Durban

C. Pretoria

D. Cape Town

The correct option for the given question is option "A". Johannesburg is the south African city which is considered a regional hub of commerce and has South Africa's premier international airport. Johannesburg is also the largest city of South Africa. It is also the capital of the wealthiest province Gauteng. This city was established and given the name in the year 1886 after the discovery of Gold in the city. In the begining of the 19th century, Johannesburg was a very unorganised city. The city was mainly populated by miners from various places.