A banking activity of the federal government would be C) storing money for the banks. The U.S. Government uses something's they call "Tax accounts" as a reserve of money because the tranasactions go through the banks anyways, so this money is stored there. This is one activity of the Federal Governments when it come to banking.
In 1901, banker John Pierpont Morgan (1837-1913) purchased Carnegie Steel for some $480 million, making Andrew Carnegie one of the world's richest men. That same year, Morgan merged Carnegie Steel with a group of other steel businesses to form U.S. Steel, the world's first billion-dollar corporation.
In his final years, Carnegie's net worth was US$475 million, but by the time of his death in 1919 he had donated most of his wealth to charities and other philanthropic endeavors and had only US$30 million left to his personal fortune.