Mental illnesses of short duration are generally considered to be "acute".
In medicine, portraying a sickness as acute signifies that it is of brief term and, as a result of that, of recent beginning. The quantitation of how much time comprises "short" and "recent" shifts by infection and by setting of the disease, however the main meaning of "acute" is in every case subjectively in opposition with "chronic", which indicates an old and long sickness.
Answer would be b. phanerozoic
This belief is known as manifest destiny. Colonists believed it was their right to expand no matter who the natives on the land were.
The construction indeed marked and changed many issues in the United States, being considered the greatest technological achievement of the nineteenth century. It was still necessary to link trade activities as well as travel between the US West and East to accelerate the economy, making the country one of the largest powers in the world afterwards.
In the later fifty the United States built several railroads, more than any other nation. By 1869 the line was completed and a journey made by horse for months and months was now possible in less than a week. Five days after the end of the road, it has started to operate daily passenger rail services. The comfort and quality of the ride was amazing and everyone was very surprised. Even the magazines gave enthusiastic accounts of the trip.
