What does the word "that" in the last paragraph indicate？A．Branding the rocks.B．Deploying

What does the word "that" in the last paragraph indicate？

A．Branding the rocks.

B．Deploying capital wisely.

C．Hallmarking the mining business.

D．Getting out of the diamond business.

请帮忙给出正确答案和分析，谢谢！