What major rivers flow into the Colorado River in the Upper Basin?

At a continent-continent convergence,

The earth's internal process which drives seafloor spreading is

To obtain a microcredit loan, a person typically must a. be a male and have a source of income b. provide collateral and sign paperwork c. verbally promise to pay back the money d. have a good credit history select the best answer from the choices provided. a b c d