When time taken to complete a given amount of work increases, then A power increases  B power decreases  C energy consumption increases      D energy consumption decreases

When the time taken to complete a given amount of work increases, there are several factors that can be affected. Let's break it down step by step:

Step 1: Time taken to complete work increases. This means that it takes longer to finish the given amount of work.

Step 2: Power increases or decreases? Power is the rate at which work is done or energy is transferred. In this case, if the time taken to complete the work increases, it means that the power decreases. This is because power is inversely proportional to time. So, option B is the correct answer: power decreases.

Step 3: Energy consumption increases or decreases? Energy consumption is related to the amount of work done. When the time taken to complete the work increases, it means that more energy is being consumed to complete the same amount of work. Therefore, option C is the correct answer: energy consumption increases.

To summarize, when the time taken to complete a given amount of work increases, power decreases (option B) and energy consumption increases (option C).