Answer:
d. defined as the time it takes to produce a product.
Explanation:
There are two concepts i.e Efficiency and effectiveness
Efficiency: In this, the work or task is performed with minimum time, effort and with available resources or we can say in the best possible manner. It deals with the techniques, not the output that will be produced after applying the techniques
Effectiveness: In this, the business organization aims to achieve its goals and objectives. It gives the end result of a particular task.
So, the correct option is d.