Explanation:

The correct answer is option 'C', which states that Kanika Enterprises follows the written down value method of depreciating machinery year after year due to consistency.

Consistency is an important principle of accounting, which requires that a company should follow the same accounting policies and methods year after year. By doing so, the financial statements of the company become more comparable and reliable.

The written down value method of depreciation is a common method used for depreciating fixed assets. Under this method, the depreciation is charged on the initial cost of the asset at a fixed rate every year. As the asset gets older, the value of the asset decreases, and hence the depreciation charge also decreases.

There are several advantages of using the written down value method of depreciation, such as:

1. Simplicity: It is a simple method of depreciation and easy to calculate.

2. Consistency: As mentioned earlier, consistency is an important principle of accounting, and this method ensures that the same method is used year after year.

3. Reflects actual usage: This method reflects the actual usage of the asset, as the depreciation charged is higher in the initial years when the asset is used more and lower in the later years when the usage is less.

4. Better matching: This method matches the cost of the asset with the revenues generated from its use, resulting in a more accurate picture of the company's financial performance.

Therefore, Kanika Enterprises follows the written down value method of depreciating machinery year after year due to consistency, which ensures that the financial statements of the company are comparable and reliable.