Who benefited most from the general mining act of 1872, which allowed individuals who discovered minerals on federally owned land to work the claim and keep the proceeds?

The people who benefited the most from the general mining act of 1872, which allowed individuals who discovered minerals on federally owned land to work the claim and keep the proceeds were Powerful investors only. This is because they were the only people who had enough financial muscle to invest in mining. 

If your answers look like this a) expansion through conquestb) development of a calendar c) development of a written language d) creation of a large road workthen the answer is dhope it