pls quick. Why the difference in the term for the house and the senate at the federal level? At the state level it is a 4 year term for the house and senate. Why do you think there is a difference at the federal level and not at the state? Explain.

To encourage railroad companies to build railroads across the west, the government gave them subsidies by select the best answer from the choices provided. a. paying the wages of laborers b. giving them building materials c. providing railroad trains d. providing free land