81. The author implied that:

Answer: A

Explanation:

Nurseries are helpful for farmers.

The extract clearly indicates that nurseries play a vital role in providing plants, trees, and shrubs to farmers and gardeners, thereby supporting agricultural activities and enhancing productivity.

A) Nurseries are helpful for farmers.

This option accurately reflects the information presented in the extract. It emphasizes that nurseries supply essential plants and crops to farmers, aiding their agricultural efforts and contributing to the overall farming ecosystem.

B) Nurseries are a waste of resources.

This option is incorrect as the extract highlights the importance of nurseries in producing plants on a large scale for sale to farmers and gardeners. It contradicts the implied value of nurseries, which are portrayed as beneficial rather than wasteful.

C) Nurseries are only useful for large-scale commercial operations.

This statement is misleading because the extract mentions that nurseries sell plants to both farmers and gardeners, indicating their usefulness extends beyond just large-scale commercial operations to individual gardeners as well.

D) Nurseries are unnecessary and rarely used.

This option is incorrect. The extract suggests that nurseries are necessary for supplying plants to farmers and gardeners, debunking the notion that they are rarely used or unnecessary.

Conclusion

Option A is definitively correct as it aligns with the extract's emphasis on the significance of nurseries in supporting agricultural practices. All other options fail to recognize the essential role nurseries play in providing resources for both farmers and gardeners, which is a crucial aspect discussed in the text.