Difficult using the MATH technique in this problem

Even after(i)_____ against the(ii)_____ of popular sovereignty were included, major figures in the humanistic disciplines remained skeptical about the proposal to extend suffrage to the masses.

  • A recommendations… continuation
  • B safeguards… excesses
  • C arguments… introduction
  • D provisions…advantages
  • E laws… creation

I tried long and hard to put guesses into those blanks, so may someone share their logic in solving this question please?

Using math strategy:

(Even after) - contrast between idea 1 & 2

Following are both the ideas simplified:
idea 1: ___ against the ___ of popular sovereignty
idea 2: major figures were not ready to give up on sovereignty

So Idea 1 should have something that contrasts with idea two. So for second blank, only advantages makes sense

My logic is similar to solemn.kvamsi’s
But for idea 2, I can rephrase it as “not extend suffrage to the masses”.
So I need to put something into the blanks which means “reduce popular sovereignty”. So I choose B. Hope this helps.