SC

[gauravgundal]

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
.
(B) an era during which the city was transformed
(E) during which the city was transformed

What is wrong with E

[Lizzy]

I think in E, the clause after 'which' only refers to 1993, as if the transformation was in 1993 and not in the era between 1973 and 1993...

Not sure, tho - only starting out with the GMAT!

[capnx]

In B, "which" is clearly referring to the "era" but in E, "which" is ambiguous. What is it referring to?

[Stacey Koprince]

Received a PM asking me to respond - but don't see an source listed for this problem. Please cite the author and I'll be happy to discuss! (I will say, though, that the commentary above is accurate.)