During the late 1800s major improvements to a nationwide system of trade were made possible how?

Completion of transcontinental railroads.

Explanation:

One of the main reasons why the 1800s saw major improvements to trade on a nationwide scale was due to the completion of the transcontinental railroads. The railroad completely transformed the way the country did business. It allowed goods and people to travel efficiently everywhere in the country. It also allowed companies to find new markets to sell their products. The railroad connected the country in an unprecedented and extremely significant way.

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )