The correct answer is: A. Increase in capital product ratio
A higher capital product ratio means that a company is using more capital to produce a given amount of output. This can be achieved by investing in new machinery, equipment, or other forms of capital. However, it is important to note that increasing the capital product ratio does not always lead to increased productivity. In fact, it can sometimes lead to decreased productivity if the company does not use its capital effectively.
For example, if a company invests in new machinery that is not well-suited to its production process, it may actually end up producing less output than it did before. Additionally, if a company does not properly maintain its capital, it may become less productive over time.
Therefore, while increasing the capital product ratio can be a way to increase productivity, it is important to do so carefully and to make sure that the company is using its capital effectively.
Option B, replacement of labour with capital according to the change in price ratios, is a helpful way to increase productivity. This is because it allows the company to produce more output with the same amount of labor. However, it is important to note that this can also lead to job losses, so it is important to consider the social and economic impact of this decision.
Option C, learning from action, is also a helpful way to increase productivity. This is because it allows the company to improve its processes and procedures over time. However, it is important to note that this takes time and effort, so it is not a quick fix for productivity problems.
Option D, none of the above, is not a correct answer. All of the options are helpful in increasing productivity, although they may not be equally effective in all situations.