Base your answer to question
on the passage
below and on your knowledge of social studies.
geneticists are tracing the movements of people
in prehistoric europe using our dna as a time
machine. .
— joe palca, “tracing human migration through dna,”
npr weekend edition saturday, august 11, 2007

this passage suggests that modern science can be
used to
(1) aid historical analysis
(2) show the development of a point of view
(3) explain ancient medical practices
(4) predict future events