An Improved Method of Radiometric Dating,which Filtered Out Contaminants,showed That

Multiple Choice

An improved method of radiometric dating,which filtered out contaminants,showed that most Neanderthal bones in Europe are older than suggested by earlier dating.This new dating suggests that Neanderthals' time on the planet did not overlap with modern humans.Radiocarbon dating depends on measuring the radioactive isotopes of carbon-14.
Which of the following statements supports the null hypothesis that modern humans and Neanderthals did not occupy the same sites at the same time?

A) The Neanderthal fossils were older than originally dated because very little carbon-14 remained in filtered specimens.
B) Small amounts of contaminating carbon-14 can make a sample seem much older.
C) The amount of carbon in an organism's body increases after death.
D) Re-dating Neanderthal sites across Europe shows evidence for extensive interbreeding between Neanderthals and modern humans.