Final answer:
The option that would most likely undermine Sweet Leaf Tea's argument for vertical integration is if it lacks the facilities or knowledge to produce the raw ingredients for its beverages, making vertical integration impractical.
Step-by-step explanation:
The argument that Sweet Leaf Tea should implement a corporate-level strategy of vertical integration would most likely be undermined if the company lacks the facilities or knowledge to produce the raw ingredients for its beverages, hence option A) Sweet Leaf Tea lacks the facilities or knowledge to produce the raw ingredients for its beverages. Vertical integration would require Sweet Leaf Tea to take on additional production processes that involve the raw ingredients used in their teas, such as organic cane sugar and honey. Without the necessary facilities or expertise, Sweet Leaf Tea may not be able to successfully integrate these steps into their business model, potentially compromising the quality of the product or increasing costs.