rahul.s wrote:Though the city had been bombed for fifty-seven nights in a row, the Blitz and the refusal to surrender London afterward took on almost mythic significance as evidence of British citizens' ability to resist the will of Hitler and Nazi Germany.

A) the Blitz and the refusal to surrender London afterward took on
B) London's Blitz and the refusal to surrender took after
C) the Blitz and the refusal of the city of London took over
D) London's refusal to surrender after the Blitz took on
E) London's refusal to surrender after the Blitz took up
OA: D
I'm very confused

The important point here is that the refusal to surrender showed the citizens' ability to resist. The Blitz (the bombing raid) did not show the citizens' ability to resist.

A) this suggests that the Blitz (and the refusal to surrender) demonstrated the citizens' ability to resist. Nope
B) this suggests that the Blitz demonstrated the citizens' ability to resist. Nope
C) this suggests that the Blitz demonstrated the citizens' ability to resist. Nope
D) This correctly identified that the refusal to surrender demonstrated the citizens' ability to resist. Good
E) Idiom problem. It says that the refusal took up mythic significance. The idiom is "took on mythic significance"

rahul.s wrote:Though the city had been bombed for fifty-seven nights in a row, the Blitz and the refusal to surrender London afterward took on almost mythic significance as evidence of British citizens ability to resist the will of Hitler and Nazi Germany.

shouldn't London be followed after the comma?

the city - London

Well, we've already identified that A is incorrect for other reasons, so a comma isn't going to make it correct.
That said, I'd be inclined to leave out commas since we want to tie the subject (refusal) to the verb (took).