Passage Summary: The government might approve a hormone for cows that boosts milk production but makes the cows sick. While vets can treat these illnesses, the cost of that medical care is much cheaper per cow for big farms than it is for small farms.

Reasoning: The hormone BST increases milk output but causes health issues that require expensive veterinary care, which is more cost-effective for large-scale farms than for small ones.

Analysis: Since this is a Most Strongly Supported question, we need to find a synthesis of the provided facts. The stimulus sets up a clear economic disparity: while both large and small farms could use the hormone to increase milk, the 'maintenance cost' of keeping the cows healthy hits small farms harder. You should look for an answer choice that suggests the approval of BST would give a competitive advantage to large dairy farms or potentially drive smaller ones out of the market. The logic hinges entirely on the 'cost per cow' difference mentioned at the end.