About 30% to 40% of American adults have a condition that has no visible signs and rarely causes symptoms, but can raisethe risk of heart disease, diabetes, cirrhosis and liver cancer. It’s called nonalcoholic fatty liver disease. And as Americanwaistlines continue to expand, the prevalence of this dangerous condition is growing as well.   Nonalcoholic fatty liver disease, or NAFLD, is an umbrella term. Most people with NAFLD have what’s known as simplefatty liver, which means that more than 5% of the liver is made up of fat cells. (Fat in the liver can also be a product of heavyalcohol use, which is known as alcoholic fatty liver disease.)   Like fat accumulation in the rest of the body, this condition is often related to obesity, poor diet and sedentary lifestyle.Excess weight also seems to make genetic risk factors worse. A recent study published in Nature Genetics found that peoplewith a high-risk variant of the PNPLA3 gene were much more likely to have fatty liver disease if they were obese than if theywere thin.   People with simple fatty liver don’t have inflammation or scarring in their liver and don’t appear to be at high risk for livercomplications. But the condition affects insulin sensitivity and puts people at higher risk for diabetes and cardiovasculardisease.
46. What is the most possible purpose of this passage?
(A) To entertain
(B) To compare
(C) To inform
(D) To object
(E) To persuade