Passage Summary: Farmers use a hormone to get more milk, but it makes cows more likely to need antibiotics. These antibiotics can be bad for people, but all milk is checked for them anyway.

Reasoning: Dairy farmers use BST to increase milk production; while BST milk is nutritionally identical to regular milk, treated cows have higher infection rates and receive more antibiotics, which are screened for in all milk types.

Analysis: This stimulus presents a set of facts without a central argument, so we are looking for a deduction that must follow from the information provided. The key tension is between the increased use of antibiotics in BST cows and the fact that all milk is screened for those same antibiotics. Since the screening process applies to both treated and untreated cows, it suggests that the risk of consumers ingesting high levels of antibiotics is managed by the testing process, regardless of the cow's origin. Look for an answer that synthesizes the risk of antibiotics with the safety measure of screening.