Which two regions currently contain the world’s last remaining ice sheets?

Witch one is it soo it the the question b.a,b,c,d

Aletsch glacier is the largest glacier in switzerland and the largest found in the alps, a mountain range which extends from monaco in the east to slovenia in the west. currently, the aletsch glacier is retreating. under what circumstances would this glacier see growth instead of retreat? a decline in plate tectonics across the mountain range annual snowfall that exceeds yearly losses an increase in ablation in the southern valleys a rise in temperatures to that of a mediterranean climate

Which two following best identify the central themes of this speech in the passage the man in the arena