An index fossil must be A. smaller than other fossils around it. B. larger than other fossils around it. C. older than 1 billion years. D. unique in its appearance.

D. unique in its appearance. Index fossils must have a unique form that is easy to identify without special equipment. Geologists make maps in the field as they gather data and specimens. If the index fossil is easy to identify without the use of a microscope or laboratory equipment, the field work can process more quickly.

Answer is  D, trust  

Explanation: Took the test          

I'm going under and this time I fear there's no one to save me

This all or nothing really got a way of driving me crazy

I need somebody to heal

(someone you loved)

Explanation: