Answer:
The correct answer is option a.
Explanation:
Productivity can be defined as a measure of the efficiency of a person, factory, machine, system, etc, to convert inputs into outputs. In other words, it is the rate of output per unit of input.
Productivity is an important determinant of living standards. A higher level of productivity means better living standards. This implies that growth in productivity is the key determinant of growth in living standards.
Answer: option "A" is correct
Explanation:
It's an official context for other options.
Answer:
a. the development of railroad cars that could haul cattle.
Explanation:
The abrupt end of long distance cattle drives in 1885 was primarily due to the development of railroad cars that could haul cattle.
It was the advent of expanding rail road lines that terminated the cattle drive through Kansas because the end points of the cattle trail shifted to meet expanding railroad lines.
It was logical that as the railroads expanded to meet the cattle drive, one had to give way to the other because cattle do stray and trains could haul cattle
I think it is
<span>D.)substituting existing technology with a new technology to produce more goods
I hope this helps </span>
