Very heavy perspiring or severe diarrhea can result in a serious reduction in the body's water content known as dehydration.
The phrase "for in abundance, there is lack" means that still, with all the help that you can get, you will never have enough. In relation to the American healthcare system, it seems that albeit the lowered cost of health care and improved services through technology and integration it seems that a lot of Americans are still dissatisfied with the current system. Unlike other countries, the United States has alloted much of its budget on the healthcare system. Patients have been diagnosed and treated sometimes by multiple physicians at a time so as to provide the most accurate care. However, even with all these help and assistance, it seems that it will never be enough and always lacking for some.
I'm pretty sure it's Human Trafficking:)
After World War II, Americans shifted to more service and agricultural jobs in a way, they decided that they should be more self-sufficient in terms of agronomy, but more importantly, they turned towards service with the rise of consumerism. Consumerism in America greatly dictated how the country has progressed in the past few decades.
B is the right answer for that reason.