Pregnant Women and Children Are Warned Not to Eat Certain

Pregnant women and children are warned not to eat certain kinds of fish that have high mercury content. Why do some fish tend to have higher mercury levels than other fish?

A) The high levels of mercury are an adaptation to avoid predation by humans.
B) Fish that are high in the food chain eat prey that already have bioaccumulated levels of methylmercury, thus further bioaccumulating the pollutant.
C) Some fish tend to thrive in habitats near factories that release high levels of mercury.
D) Some species of fish live in areas that are more contaminated with methylmercury. The species of fish living in those areas should be avoided.
E) Fish that are high in the food chain eat prey that already have biomagnified levels of methylmercury, thus further biomagnifying the pollutant.