A. because they preferred to use - 'they' is ambiguous + Parallelism error. 'they' can refer to 'inexperienced art history students' or to 'Impressionist painters'.
B. their preference for - Correct
C. they preferred to use - Parallelism error
D. by the preference that they showed for - Same as A
E. by their preference for - Parallelism error. Usage of 'by' again is not needed.
Answer: B
B. their preference for - Correct
C. they preferred to use - Parallelism error
D. by the preference that they showed for - Same as A
E. by their preference for - Parallelism error. Usage of 'by' again is not needed.
Answer: B






