Question

4. What must be true about an index fossil whose absolute age is used as a reference for other fossils? (1 point)
The absolute age of the index fossil is actually unknown.
The absolute age of the index fossil was determined only by relative dating.
The absolute age of the index fossil was determined by radioactive dating or another absolute method.
The index fossils must be the same age as the other fossils.

Answer 1

http://openstudy.com/study#/updates/5139069ae4b01c4790d0ea96

Answer 2

C.

Answer 3

Wait, D

Answer 4

It's C