San Franciscans of the 1890s mocked the claim that declared Los Angeles a world city, yet within twenty years a powerful municipal will had made this boast a reality.

a) yet within twenty years a powerful municipal will had made this boast a reality
b) yet within twenty years a powerful municipal will made this boast a reality
c) yet a powerful municipal within twenty years will make this boast a reality
d) yet this boast had become a reality within twenty years because of a powerful will municipally
e) yet within twenty years a municipal will had made this boast a powerful reality

[spoiler]OA is A and the reason given is that since there are 2 past events we need the past perfect "had made". [/spoiler]

[spoiler]But isn't past perfect used to indicate the sequence of events where the past perfect verb represents the older of the 2 events. Here "mocking" happened before someone "made it a reality". So isn't the usage as given here incorrect.

I found B to be more apt. Since the time line is clearly given we do not need past perfect to highlight the sequence.[/spoiler]