Which phrase best defines the term corroboration?

Why did the us government establish washington territory in 1853?

How did the cleveland massacre impact standard oil in 1872? standard oil hired all the laborers who were nearly killed during the cleveland massacre. standard oil became a monopoly in the cleveland oil market after the cleveland massacre. standard oil was bought out by other companies in the city after the cleveland massacre. standard oil closed down to avoid additional violence in the wake of the cleveland massacre.

Explain how the self-interest of state-chartered banks in 1865 led to the development of demand deposit accounts.