Question

(9.2) one major way that horizontal integration helped businesses lower production costs was by
limiting their production.
merging competing firms.
setting up agreements to fix prices.
encouraging competition for products.

Explanation:

Horizontal integration involves merging competing firms. This can lead to economies of scale, which help lower production costs. Encouraging competition would likely increase costs for individual firms. Setting up agreements to fix prices is unethical and illegal in many cases (anti - trust violations). Limiting production is more related to supply - side strategies that can increase prices rather than lower production costs.

Answer:

merging competing firms