请教各位og12 语法分册 52, 53 ！！！

52. Recently discovered fossil remains strongly suggest that the Australian egg-laying mammals of today are a branch of the main stem of mammalian evolution rather than developing independently from a common ancestor of mammals more than 220 million years ago.
   (B) rather than a type that developed independently from
   (c) rather than a type whose development was independent of

答案是B 啊，我选的C 啊, 这个independtly from 和 independent of 怎么区分呢？




53. The normative model of strategic decision-making suggests that executives examine a firm's external environment and internal conditions, and in using the set of objective criteria they derive from these analyses, can decide on a strategy.

(A) conditons , and in using the set of objective criteria they derive from these analyses , can decide
(B) conditions, and they use the set of objective criteria derived from these analyses in deciding
(c) conditions and, in using the set of objective criteria derived from these analyses ,deciding
(D) conditions and , using the set of objective criteria derived from these analyses , decide
(E) conditions and,  in their use of the set of objective criteria they derive from these analyses ,they decide


答案是D 啊，我选的是B 啊，呜呜...  题目中有and 啊,  我很自然地就想到平行了...可是答案是D, 大家能帮我分析分析吧！！ 到底什么时候是平行，什么时候不平行呢...?我已经晕了...