Choose all that apply. evidence of climate changes and conditions that affected early societies are gathered from written records ice core samples tree rings mapschoose all that apply. evidence of climate changes and conditions that affected early societies are gathered from written records ice core samples tree rings maps

Very early societies did not have a written language or even ways to efficienly preserve information, so we can reject the options "maps" and "written records". 
As far as the other two options go - ice core samples and tree rings, both are correct! probably "ice core" samples are the better answer, since only fossilized tree rings would tell us about the very early societies.

Ithink your answer is b