Here's a question: The two friends had been close for decades, but one of their new habits of lying had become a what between the two?

Here are possible answers to this question:
- deception
- feeling guilty
- more lies
- mistake
- betrayal of trust

I believe the correct choice is "betrayal of trust", here's why:


the answer is betrayal of trust because the question states that they've been close for decades and you can only be close to someone for that long if there is trust. however, since they've just started lying to each other, they are betraying the trust they had as they were "close for decades".