Passage Summary: When doctors recommended boiling cow's milk to kill germs, babies started getting scurvy from a lack of Vitamin C, but babies who were breast-fed stayed healthy.

Reasoning: Historically, boiling cow's milk for infants to prevent infection led to an increase in scurvy (vitamin C deficiency), whereas breast-fed infants did not develop the condition.

Analysis: For a 'Most Strongly Supported' question, we must synthesize the facts provided. We are told scurvy is caused by a Vitamin C deficiency and that it appeared specifically after the practice of boiling cow's milk began. Since breast-fed infants (who did not drink boiled cow's milk) were fine, it is highly probable that the boiling process either destroyed the Vitamin C in the cow's milk or that cow's milk is an inferior source of the vitamin compared to breast milk.