Official Solution:It is possible that the Roma people
have migrated from India across Europe over the course of several centuries that were characterized by this type of nomadic wandering.
A. have migrated from India across Europe over the course of several centuries that were characterized
B. had migrated from India across Europe over the course of several centuries that were characterized
C. migrated from India across Europe over the course of several centuries that had been characterized
D. migrated from India across Europe over the course of several centuries that were characterized
E. migrated from India over the course of several centuries that were characterized across Europe
The original sentence has a verb tense error.
Have migrated is in the present perfect tense, which is used to indicate that an action began in the past and is continuing. However, the centuries, in the past,
were characterized by nomadic wandering.
Choice
D uses the past tense
migrated to describe the action that began and ended in the past. Choice
D is correct.
Choice B incorrectly uses the past perfect
had migrated. This event did not occur
before the centuries, it occurring during these centuries.
Choice C incorrectly uses the past perfect
had been characterized. These centuries were not characterized
before the migration occurred.
Choice E contains a modification error.
Across Europe illogically comes immediately after and seems to modify where the centuries were characterized.
Answer: D