What determines the length of a geologic time period?
o fossil record
o material density
o meteors and rocks
o radioactive materials
you guys should like s answer my question heart eyes

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )

The answer is letter c