Identify the first important achievement in transportation on your timeline?

the answer is d. party organizers, volunteers, voters and elected officials.

the world may never know

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

d.

the northwest territory became the most densely populated area in the u.s.