She was less successful after she had emigrated to New York compared to her native Germany, photographer Lotte Jacobi nevertheless earned a small group of discerning admirers, and her photographs were eventually exhibited in prestigious galleries across the United States.
A) She was less successful after she had emigrated to New York compared to
As mentined above - Usage of "Compared to" and "less" in the same clause renders it redundant.
Also two independant clauses are connected by a comma , without any conjunctions ( and , but etc) . - "she was less successful, photographer LJ earned "
usage of "had to" is unjustified here , since it sounds like , her emigration to new york happened before germany. Since she was a native of germany , she would be in germany first and then emigrated to NY . According to me , the usage of "had" is incorrect here.
B ) Being less successful after she had emigrated to New York as compared to
Reduandant(less and compared to) as in option A.
same issue with usage of "had" as in A
Also "being" is incorrect/redundant. If the sentence stands the same when you exclude "being" from it , the usage the "being" in such scenarios is almost always wrong. ( compare with C. The sentence without being there stands perfect).
C) Less successful after she emigrated to New York than she had been in
Correct. The opening sentnec acts as a modifier modifing phtographer LJ. Also the usage of "had been" indicates that she had been in germany first and then NY. correct depiction of chronology.
D) Although she was less successful after emigrating to New York when compared to
Same redundancy issues as with other incorrect options. Also the opening modifier in C is concise and conveys clear meaning compared to this choice.
E) She had been less successful after emigrating to New York than in
Reverse chronology.- Usage of "had been" indicates that she had been in NY first and germany later.
Is a run on sentence , as option A . Need a conjunction to connect two independent clause, rather than just a comma.