Although Linus Pauling was well-known for his work as an educator, author, and peace activist, his work in chemistry, specifically the nature of the chemical bond,
which had begun in the 1920s, gained the most recognition in that it earned him both the Irving Langmuir Award as well as the Nobel Prize in Chemistry.
Quote:
A. which had begun in the 1920s, gained the most recognition in that it earned him both the Irving Langmuir Award as well as the Nobel Prize in Chemistry
Now, 'which' should modify the preceding noun but the intention of 'which had begun in the 1920s' is to modify ' his work in chemistry'.
Even the idiom BOTH X and Y is incorrectly used
Quote:
B. begun in the 1920s, gained the most recognition, earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry
Here both modifiers 'specifically the nature of the chemical bond' (an appositive or noun modifier)and 'begun in the 1920s' (past participle) modify 'his work in chemistry', and the idiom both x and y is correctly used.
Although we should avoid back-to-back modifier, but here this is the best choice.
The construct is
Although Linus Pauling was well-known for his work as an educator, author, and peace activist (Modifier), his work in chemistry,
specifically the nature of the chemical bond (NOun modifier),
begun in the 1920s(Past participle_modifier), gained the most recognition,
earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry(Modifier).
Quote:
C. begun in the 1920s, gaining the most recognition by earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry
Even if we take the modifier 'begun in 1920s' as a verb, the modifier 'gaining the most recognition by earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry' does not make sense.
Present participle or ING-modifier is supposed to modify the entire preceding clause or the subject.
Quote:
D. had begun in the 1920s and which, earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry, gained the most recognition
Although Linus Pauling was well-known for his work as an educator, author, and peace activist, his work in chemistry, s
pecifically the nature of the chemical bond (modifier),
had begun in the 1920s and
which, earning him both the Irving Langmuir Award and the Nobel Prize in Chemistry, gained the most recognition.You don't require past perfect tense here, and the clause ' which, earning...' is incorrect.
Quote:
E. had begun in the 1920s, earning him both the Irving Langmuir Award as well as the Nobel Prize in Chemistry, and gaining the most recognition
completely faulty in construction.. Both x as well as y is wrong. Past perfect is not required..
B is the best choice.