Correct answer: If either conclusion I or II is true
K=S (from statements). Conclusion I: K<D. Conclusion II: S≥D → K≥D (since K=S). These are complementary (one covers K<D, the other K≥D). No chain connects K directly to D. We can't determine which is true, but exactly one of them MUST be true. Hence: either I or II follows.