What effects did the construction of the transcontinental railroad have on coast-to-coast communication?
it made coast-to-coast communication instantaneous.

it reduced coast-to-coast communication from about a week to about a day.

it reduced coast-to-coast communication from about 180 days to about a week
.
it made coast-to-coast communication more complicated.

It reduced coast-to-coast communication from about 180 days to about a week.

Explanation:

This is the answer that best describes the way in which the construction of the transcontinental railroad impacted coast-to-coast communication. Before the railroad, communication from coast-to-coast was extremely difficult. Not only did news take a long time to travel, but often they were unable to do so, as the journey was complicated and could not be done by anyone.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: