I chose D, but started to see why B is correct. Here's my revised train of thought. Premise: Imagine trying to list every synthetic ingredient used in grass that cows eat or in other substances related to the production of milk. Conclusion: The proposal made by lawmakers that milk labels should be r...

This one is really tough, and I missed it initially. Here's my revised train of thought. Reproductive issues in fish have been noticed by biologists. One potential cause is that a mill directly upstream is releasing dioxin which can cause hormone alterations in fish. This in turn could be causing th...