Analysis:
Not X but Y parallelism
Grew -
- not in a steady manner
- but were amassed quickly
The word Grew is outside, so according to Once outside rule, the term 'Grew' also applies to 'amassed quickly' which is not the case in the underlined statement.
Lets see the answer choices
A. grew not in a steady manner but were amassed quickly -
IncorrectBased on our analysis, the verb grew is outside the parallelism marker, so the statement is not maintaining the parallelism structure.
B. grew not steadily but were amassed quickly -
IncorrectSame as in option A
C. did not grow in a steady manner but quickly -
IncorrectRemoves the parallelism marker and introductes new error , did not grow in a steady manner but quickly, the adverb after but does not match with the prepositional phrase that comes before but.
D. were amassed not steadily but had grown quickly -
IncorrectIncorrect structure, the right wording is not steadily but quickly. The Not x but Y structure is not retained.
E. were amassed not steadily but quickly -
CorrectThis option conveys correct meaning, the verb is once outside and the correct parallelism structure Not x but Y is used correctly
Ans:
E