During which decade did transcontinental rail service begin in the united states?
a.1850–1860
b.1860–1870
c.1870–1880
d.1880–1890

1860 - 1870 ( B )

Explanation:

The FIRST Transcontinental rail service was constructed  from 1863 to 1869. it makes up part of the history of the united states of America as the first railway to connect the Pacific and Atlantic coastal areas of the western part of the united states of America. this transcontinental rail service/road was 1912 miles in length.

The transcontinental rail road was a continuous rail road that cut across cities with its terminal placed at different positions along the route which the rail service covered extensively. this transcontinental rail service aided the movement of goods and service between the areas connected by the continuous railroad. it is very big symbol in the American history in general.

b. after i get up in the morning,

explanation:

after is a subordinating conjunction that introduces a time clause. time clauses are dependent clauses used to indicate when something happened.

the clause "after i get up in the morning" tells when the action in the main clause (drinking a cup of coffee) happens:

"after i get up in the morning, i drink a cup of coffee." it is the most logical choice of all.

the growing interconnectedness of the world through communication, trade, and the exchange of ideas is an important theme in the history of the 20th and 21st centuries.

explanation: