Sadira makes a graphic organizer to show how geologists and archaeologists use radioisotopes.
Which labels belong in the regions marked X and Y?
A. X: Uses carbon-14
Y: Uses uranium-238
B. X: Uses uranium-238
Y: Determines ages of objects
C. X: Determines ages of objects
Y: Uses uranium-238
D. X: Uses isotopes with short half-lives
Y: Determines ages of objects
