Passage Summary: To keep any relationship going for a long time, you need trust and respect. If it's a personal relationship like a friendship, you also need to actually like each other.

Reasoning: Trust requires mutual respect and is necessary for any long-lasting relationship; additionally, personal relationships require natural affinity to endure.

Analysis: Since this is a 'Must be True' question, we must treat the premises as absolute rules and look for a valid deduction. We know that trust is a requirement for all long-lasting relationships and that trust itself requires mutual respect. Therefore, we can conclude that mutual respect is a requirement for any long-lasting relationship. Look for an answer choice that stays within these logical bounds without introducing new, unstated requirements.