求解惑！63篇第14篇第9题

公元前334

没看懂文章里面说的难点，谁能帮忙理理呢？话说Biology主题真真是坑呀，分分钟秒杀我大天文大物理。。。

9.     Whichof the following circumstances is most comparable to the impasse biologistsencountered in trying to resolve the debate about cell determination (lines12-18)?

(A) The problems faced by a literaryscholar who wishes to use original source materials that are written in anunfamiliar foreign language

(B) The situation of a mathematician who inpreparing a proof of a theorem for publication detects a reasoning error in theproof

(C) The difficulties of a space engineerwho has to design equipment to function in an environment in which it cannotfirst be tested

(D) The predicament of a linguist trying todevelop a theory of language acquisition when knowledge of the structure oflanguage itself is rudimentary at best

(E) The dilemma confronting a foundationwhen the funds available to it are sufficient to support one of two equallydeserving scientific projects but not both

Adebate arose over what exactly was happening. Which embryo cells aredetermined, just when do they become irreversibly committed to their fates, andwhat are the “morphogenetic determinants” that tell a cell what to become? But the debate could not be resolved because no one was able to ask the crucialquestions in a form in which they could be pursued productively. Recentdiscoveries in molecular biology, however, have opened up prospects for aresolution of the debate. Now investigators think they know at least some ofthe molecules that act as morphogenetic determinants in early development. Theyhave been able to show that, in a sense, cell determination begins even beforean egg is fertilized.