Passage Summary: Engineered foods help grow connective tissue but don't directly build muscle strength through growth hormones. Because of this, the author claims athletes who want to be stronger shouldn't use them.

Conclusion: Athletes who want to increase their muscle strength should avoid consuming engineered foods.

Reasoning: Engineered foods stimulate growth hormones that only affect connective tissue rather than muscle mass, and therefore do not improve strength.

Analysis: The argument contains a significant gap: it assumes that because one specific pathway (growth hormones) doesn't lead to muscle strength, the food has no other way of helping. We need to find a 'Necessary Assumption,' something the argument must have to survive. If engineered foods provided strength through a different mechanism—like the protein itself aiding muscle repair—the conclusion would fall apart. Look for an answer that rules out other potential benefits these foods might provide for muscle strength.