Why D is not correct?
(D) Leaf cutters and most other ants in having nests vs. (C) leaf cutters and most other ants, whose nests are..... the correct one
其实OG D解释清楚了,in having nests 使得这个从句的逻辑主语变为 raider,仅仅是改变还站不住脚。后面解释又强调了raider ants 后面位置是portable nest 与前面underground or in pieces of wood相驳,从而证明这个改变是完全改变句意的。进一步看A有相同问题,A没限定词时候,situated修饰主语raider ants. B which 试图修饰,但不如whose具体明确。 实战中看到having, which如果要选为答案我觉得都要非常谨慎。