After identifying unfamiliar words and paraphrasing text, the final step of finding the overall central idea of a sonnet is B) looking for context clues. If you made a research regarding unknown old-fashioned words and got more modern interpretation of the sonnet, and still do not get the main idea of the sonnet it is better to analyze it and to find context clues. It does not matter whether it is Italian or English sonnets, they always contain clues that are usually hidden in the last lines.