What was the main benefit of the factory system? A. It increased the value of the workers and as a result, salaries rose. B. It reduced pollution caused by family-based power sources. C. It gave people their first chance to support themselves. D. It cut costs and made workers more efficient.

B

Explanation:

D) It cut cost and made workers more efficient.

Explanation:

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in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.