C 1650 Because you have to factor in the difference of BC and AD. you must get 1200 BC to 0 first, and then go to 450, therefore getting 1650
Answer:
Geologists use radiometric dating to estimate how long ago rocks formed, and to ... as "bracketing" the age of the sedimentary layer in which the fossils occur.
Explanation:
The 3rd one is the answer I think