Question

The Hadean was a time in Earth history when ________. A. the first abundant shelly organisms appeared in the fossil record B. Earth’s interior was so hot that a solid outer crust, if present, was likely being extensively remelted C. stable continental interiors, termed cratons, first formed D. the dinosaurs appeared and came to dominate large-scale terrestrial life

Answer 1

The Hadean era was before rocks were formed so I’d say b) . Hope this helps :)