a newly discovered painting on wooden panel by michelangelo must have been completed between 1507 and 1509. it cannot have been painted earlier than 1507 because one of its central figures carries a coin that was not minted until that year. it cannot have been painted after 1509 because it contains a pigment that michelangelo is known to have abandoned when a cheaper alternative became available in that year. the answer to which of the following questions would be most useful in evaluating the argument above?
