How did the completion of the transcontinental railroad change the lives of American citizens? O It increased the wealth of all Americans and enabled them to travel more,
O It made cross-country travel too expensive for ordinary Americans.
O It decreased the safety of Americans who moved to settle the plains.
O It shortened travel time between the East and West for all Americans,

what is the "did this mean" there is no picture. edit your question with a screenshot.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

your answer will most likely be a.

monitor contract compliance and results of forestry activities to assure adherence to government regulations.  

plan and supervise forestry projects, such as determining the type, number and placement of trees to be planted, managing tree nurseries, thinning forest and monitoring growth of new seedlings.  

establish short- and long-term plans for management of forest lands and forest resources.  

determine methods of cutting and removing timber with minimum waste and environmental damage.  

supervise activities of other forestry workers.

by the way there is no video here.