In an experiment, museum visitors viewed photographs of historical tools and rated how likely each tool was to be authentic. Labels described a tool's origin either definitely, using language such as “made in,” or tentatively, using language such as “possibly made in.” Tentative wording lowered authenticity ratings for tool types the visitors already knew but had little effect on ratings for unfamiliar types. Eye-tracking data indicated that visitors looked at tentative qualifiers for similar amounts of time across familiar and unfamiliar items. In a follow-up experiment, participants first read a short background passage about an unfamiliar tool type; afterward, tentative labels lowered authenticity ratings for that type as well. Taken together, these findings suggest that _____.
Which choice most logically completes the text?