Answer: The answer is C, only I and II must be true
Explanation:
According to Pareto, An economy is more efficient if it can make use of less resources to produce more goods and services a situation can be economically efficient if
1. No one can be made better off without making someone worse off. It is commonly referred to as pareto efficiency or pareto optimum.
2. No additional output can be obtained without increasing the amount of input
3. Production is done at the cost in which the cost of producing one unit of a product is very low.