Read the following passage carefully and answer the given questions
The earthworm is referred to as the farmer's friend. This is because they help in the breakdown of complex organic matter as well as in loosening of soil. Similarly, decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients and the process is called decomposition. Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. Some of the steps in the process of decomposition are fragmentation, catabolism, leaching, humification etc.
Which one of the following is not associated with earthworm as 'farmer's friend'?

1. A It reduces the quality of crops and soil
2. B Faecal matter adds into fertility of soil
3. C It helps with the breakdown of complex organic matter
4. D It helps to loosen soil.