One quick keyword for answering "Inference" type questions in both RC and CR sections is "Must be True". Based on some given facts or premises, the answer choice which shows a must be true correlation is the correct answer.

Specifically, for RC passages, correct answers to Inference questions sometimes are just rewording or rephrasing of a text in the passage. Based on the question stem, go back to the passage and look for the same words as given in the question. Again, before finalizing your answer, make sure you check the "Must be True" criteria.

Hope that helps.