Colonial powers were particularly interested in mining which resource that was abundant in africa?copperivorydiamonds  iron ore

The correct answer is letter C: Diamonds.

Back in the 19th Century, the British Government was attracted by all the mineral wealth Africa possessed, especially diamonds, creating a "diamond rush" among other nations such as United States and Australia.

South Africa became the major source for the ones seeking diamonds and colonize the area in order to have the monopoly of the industry.

The answer is:

diamonds