Whats is one way the author makes a distiction between the first transcontenentail railroad

c. is the answer to your question.

explanation:

buenas noches would be your answer

the answer is academic paper

and the second should be college professor

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.