After identifying the conclusion in the argument always ask the question "Why would this be true" i.e "Why would this conclusion be true" (If what had already happenned would make this true or in other words what would the author already have conidered as a fact but has not stated)

The best answer to the question above will most likely be the correct answer choice.

Juts a friendly tip. Use it intelligently

Hope I am making sense here and if not please ignore the post and move on.

Good luck!