GMAT Sentence Correction
Tom Bradley was mayor of Los Angeles from 1973 to 1993, an era when the city had transformed from a collection of suburban neighborhoods to the second-largest city in the United States.
- A an era when the city had transformed
- B An era during which the city was transformed
- C An era that transformed it
- D During which era the city transformed
- E During which the city was transformed
Correct Answer: B