1. SCIENTISTS HAVE DISCOVERED THAT BEFORE AN ERUPTION, EARTHQUAKES GENERALLY

C) to ensure each new cell has an exact copy of the dna

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

Sorry i was trying to figure out the answer to your question. but can't sorry