Field studies, which have long been a staple of anthropological research, involve the researcher living within the community being studied. However, the usefulness of field studies tends to be overrated by anthropologists. Although most anthropologists do realize that living within the community one is studying affects that community, they generally underestimate the extent of such effects. Which one of the following most accurately expresses the conclusion drawn in the argument? ['Field studies have been a central feature of anthropological research for a long time.', 'Anthropologists tend to overestimate the value of field studies.', "Most anthropologists underestimate how much of an effect the researcher's presence has on a community being studied.", 'Most anthropologists know that when they live within a community being studied, the community is affected at least somewhat.']