Respuesta :
The sudden surge in population in Australia including British and Irish nationals happened during the Gold Rush era. In this era, discrimination happened almost everywhere because of the difference in races and religious beliefs. This has led to the restriction of the migration to the country Australia.
Correct answer choice is :
B) British colonists discovered gold.
Explanation:
But, these were minor banks, and today it is the general agreement that honors for the discovery of the central gold reef must be credited to George Harrison, whose conclusions were made, either through chance or systematic prospecting. Before long open cast manipulations were being opened up along the full length of the central reef in the present region of Johannesburg.