The correct answers are If the neighboring kingdom were to attack tomorrow, your defenses would crumble. and Suppose your majesty were betrayed by a close friend; how would you react?

Let's break down the options:

• Correct: "If... were to attack" is the standard formal subjunctive for a hypothetical future event.

• Correct: "Suppose" functions as a conditional conjunction (just like "if") and correctly triggers the subjunctive "were" for the singular subject "your majesty."

• Incorrect: "Were the new treaty to be signed..." is a great subjunctive clause, but the main clause uses "will end" (first conditional) instead of "would end" (second conditional).

• Incorrect: "Was the royal advisor to resign..." uses "was" for inversion. Conditional inversion ONLY works with the subjunctive "were" (i.e., Were the royal advisor to resign).