Critical Reasoning (CR) | Re: People who browse the web for medical information often cannot discrim

People who browse the web for medical information often cannot discriminate between scientifically valid information and quackery. Much of the quackery is particularly appealing to readers with no medical background because it is usually written more clearly than scientific papers. Thus, people who rely on the web when attempting to diagnose their medical conditions are likely to do themselves more harm than good.

Which one of the following is an assumption the argument requires?

(A) People