<p>If any signer of the Constitution (A) was to return to life (B) for a day, his opinion (C)of our amendments (D)would be interesting.</p>
<p>Actually, i know that the answer is (A).</p>
<p>but this is one of the first questions were i have no idea why its A.</p>
<p>It should be in the subjunctive case since this is a hypothetical situation. The clue is the “would be” later on in the sentence.</p>
<p>Subjunctives read : “if x were to happen, I would y” or “I would y were x to happen” (or several other variations). Look for the would-were combination.</p>