According to Map 18.1: Railroad Expansion, 1870-1890, which city was a major railroad hub in 1870? 
Definitions:
Psychological State
The mental condition of an individual at a particular time, influenced by emotions, thoughts, and behaviors.
Job Characteristics Model
A theory that proposes that the nature of a job affects employee motivation and job satisfaction, focusing on five core job dimensions.
Job Involvement
A cognitive state of psychological identification with one’s job and the importance of work to one’s total self-image.
Relational Architecture
The design and structure of relationships within an organization, including how communication, authority, and tasks are organized.
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