What was one government reform enacted by the tang dynasty

Which  was not a problem faced by farmers in the late 19th century

Which of the following was not an effect of westward expansion? a. native american tribes suffered confinement on reservations. b. native americans learned new techniques of irrigation. c. many native americans died from the spread of disease. d. natural resources were depleted from misuse by white settlers.

What specific events led richard nixon to resign the presidency