Hi Ferraro.
There's generally a clear reason why one CR answer choice is better than the others. Here are some key things to keep in mind.
One is that we can use common knowledge in CR. For instance, it's common knowledge that cars travel on roads and that fish swim. So, if you need common knowledge to make a connection in CR, you can safely do so.
Another is that we can make logical connections in CR. In other words, we can consider the direct implications of choices. We can't make up unsupported stories, but using ideas that clearly follow is fine.
So, you can draw the line by learning to see the difference between what is clearly implied and what's an unsupported story.
For example:
We got to the event late.
Direct implication: We did not arrive at the event before it was scheduled to begin.
Unsupported story: We missed the most important part of the event.
Unsupported story: We were criticized by people who had arrived on time.