What happened after roman empire ends in west

What directive in source a might have been at the root of the action described in source b?

Read this brief excerpt from the declaration: we hold these truths to be self-evident, that all men are created equal, that they are endowed by their creator with certain unalienable rights, that among these are life, liberty and the pursuit of happiness in a two- to three-paragraph essay, define in your own words the meaning of the unalienable rights of life, liberty, and the pursuit of happiness. in your response, make sure to address whether these rights apply to ideals or issues that are important in today’s world.

The transcontinental railroad runs from the to the i. north ii. south iii. east iv. west a. i and ii b. ii and iii. c. iii and iv d. ii and iv