The conservator initially suspected that the recently donated map was a modern imitation; however, laboratory tests dated its paper and ink to the seventeenth century, leaving her [Blank 1] that the map was authentic.
Select two answers.
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Answer: B (convinced) and F (certain)
The word “however” signals a reversal. The conservator initially suspected that the map was an imitation, but the laboratory results established that its materials came from the seventeenth century. Thus, the tests left her convinced or certain that the map was authentic. These choices produce sentences with equivalent meanings.