【正确答案】 A

【答案解析】推理判断题。在南极探险，探险者不仅需要现代化的装备，而且要有足够的勇气和坚韧不拔的精神，二者缺一不可。正如文中所述：Modern science and inventions are revolutionizing the techniques of former explorers，and，although still calling for courage and feats of endurance，…因此A项为正确答案。