Question ID:PT81 S2 Q12 Passage:A 1955 analysis of paint samples from an Italian painting found evidence of cobalt, suggesting the use of cobalt blue, a pigment not used in Europe before 1804. The painting was thus deemed to have been produced sometime after 1804. A 2009 analysis also found cobalt, but that analysis suggested that the painting might have been produced before 1804. Stem:Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above? Correct Answer Choice:AChoice A:The 2009 analysis revealed that cobalt was located only in the topmost paint layer, which was possibly applied to conceal damage to original paint layers. Choice B:The 2009 analysis used sophisticated scientific equipment that can detect much smaller amounts of cobalt than could the equipment used for the 1955 analysis. Choice C:The 2009 analysis took more samples from the painting than the 1955 analysis did, though those samples were smaller. Choice D:Many experts, based on the style and the subject matter of the painting, have dated the painting to the 1700s. Choice E:New information that came to light in the 1990s suggested that cobalt blue was used only rarely in Italy in the years immediately following 1804.