Final answer:
To reduce the inflation rate from 10% to 5%, a sacrifice of 15% of annual output is required.
Step-by-step explanation:
To determine the sacrifice required to reduce the inflation rate from 10% to 5%, we need to use the sacrifice ratio.
The sacrifice ratio measures the percentage reduction in output that is required to decrease inflation by 1%. In this case, the sacrifice ratio is 3.
This means that for every 1% reduction in inflation, there is a 3% reduction in output.
To reduce the inflation rate from 10% to 5%, we need to decrease inflation by 5 percentage points.
Therefore, the sacrifice required would be 5 x 3 = 15% of annual output. So, the correct answer is d. 15 percent of annual output.