Answer:
The correct answer is the option C: consolidates many firms involved in the same business into one giant company.
Explanation:
Horizontal integration, is the name given in the field of microeconomics and strategic management, to the term that refers to a strategic technique done by many companies whose process has the main purpose of increasing its production of goods at the same part of the supply chain via acquisition or merger. In addition, this type of technique could cause monopoly.