Which of these helped to further the Westward Expansion (furthered the Manifest Destiny belief) in the United States after 1865?

A = Transcontinental Railroad  <===

B = Abolition of Slavery

C = Lewis and Clark Expedition

B = The Civil War

Respuesta :

                                                                                                                                ................................................................................        a is the answer                                                                                                         
Transcontinental Railroad