A:
This is 100% grammatically correct. I think the rhetorical emphasis on the subject makes it clear who will do the marrying. Let's say this one is 90% clear.

D:
This is also 100% clear, absolutely no ambiguity imaginable, and we get to keep the queen. This is win-win.

Th is sentence should use the construction x
happened so that y could happen; so introduces a
clause of purpose, explaining the reason for the
action in the main clause. Henry … sought to have
his marriage … annulled so that he could marry Anne
Boleyn. Th e relationship between the two clauses
is clear.
A So as to marry is not idiomatically correct;
it does not identify who will marry.

Prep2008E1-SC-174也是so as to和so that

so as to...是接的indirect intention，而这句里marry Anne是King sought to have marriage to Queen annulled的direct intention，所以这种情况下应该用so that...会比so as to好

老师，是不是E选项里面的would用法不对呢？
那A选项又为什么不对呢？so as to做状语，原则是就近修饰，所以修饰have...annulled。