Answer:Part A
Water Carriers.
Part B.
The transportation energy cost has rising very rapidly during the 20th century.
Explanation: Water Carriers are transportation systems which makes use of water as the channel through which goods, and people can be transported from one point or place to another.
Between the eigtheenth and nintheenth century,water carriers were more prominent and more in use.
Water transportation is one of the most efficient means of transportation, capable of transportation a very large amount of goods, it has a high energy cost which has made less of interest to the Manufacturing sectors of the twentieth century.
