哇，这题D选项考察的真的是代词指代么？😂

A. which指代对象是the marketing，错误
B. 主谓agreement
C. developing...不能thrive，应该是television programs
D. they前面有federal regulations和programs两个对象

C: developing不能正在繁荣

The sentence says that the marketing of toys was once prohibited. Logically, it makes much more sense to say that such programs that are now thriving were once prohibited. Thus, it should have been “which were once prohibited” in place of “which was once prohibited”.
Prohibiting a practice (developing programs in conjunction with the marketing of toys) makes more sense than prohibiting the final product (programs developed in conjunction with the marketing of toys)
(A) Incorrect. For the reasons mentioned above.
(B) Incorrect. For the following reasons:
The plural subject “programs” doesn’t agree with the singular verb “is thriving”.
The Noun+Noun modifier “a practice…” modifies “the marketing of toys”, leading to the same error as the first error in the original sentence.
(C) Incorrect. For the following reasons:
The use of “as” is incorrect. The correct construction would be “once prohibited by federal regulations”.
The option says that developing television programs is thriving. Either we should say that television programs are thriving or we should say that the practice of developing television programs is thriving.
(D) Incorrect. “they”, being the subject of a clause, refers to the subject of the preceding clause i.e. “regulations” in this case. Thus, the option means that the regulations are thriving. Clearly, an illogical meaning.
(E) Correct.

C. developing...不能thrive，应该是television programs

developing不能thrive

A和B都有主谓不一致的问题，C的主语的改变改变了原句意思，D选项they指代不清

C as 从句缺主语 意思不对 B 主谓不一致

C. as 引导的状语从句缺少主语，C错误。并且，“发展”这个行为在繁荣不对

排除后剩下CE，C为啥错，因为Developing ...is thriving...中文听起来OK，但是GMAT听起来逻辑不正确

第三个是意思错了 就算意思不错is也错了 as后面要加clause

A.which指代错误
B.主谓一致错误
C.是programmes在thriving,不是发展电视节目在thrivIng
D.they指代有歧义
E正确。句间逻辑合理，某个电视节目曾经被禁止，现在在繁荣发展。

A. which引导的定语从句修饰其前面的toys，但逻辑上是Television programs developed in conjunction with the marketing of toys这个事件prohibited by federal regulations，A错误。

A: which 指代不正确
B:主谓不一致
C: developing不能正在繁荣
D:they 指代不清，句子重心不对
E:

第一个是which不能指代toys
第二个是television programs -- is
第三个是意思错了 就算意思不错is也错了 as后面要加clause
第四个是they指代错误

B 选项主语是“Television programs”，后面的is主谓一致错误。C选项：Developing TV programs is thriving意思错了，而且As引导的状语从句缺少主语

programs are thriving 正确，developing is thriving错误

大致句意：与玩具市场合作的电视节目，曾经一度是被联邦法则禁止的，现在却被允许了而且发展的很好。
A：which was 修饰对象错误，这里应该是说这前面这一整个部分是被禁止的；
B：主谓一致错误
C：Developing TV programs is thriving整个意思就错了
D：they指代不明，是regulations还是programs？
E：正确。

A. which引导的定语从句修饰其前面的toys，但逻辑上是Television programs developed in conjunction with the marketing of toys这个事件prohibited by federal regulations，A错误。
B. Television programs developed in conjunction with the marketing of toys是一个完整的句子，a practice that federal regulations once prohibited, is thriving in the free market conditions permitted by the current Federal Communications Commission是另外几个句子，两个句子之间缺少连词，B错误。
C. as 引导的状语从句缺少主语，C错误。
D. they指代不明，regulations or programs? D错误。