From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. My parents taught m...

Answer Details

The correct option to complete the sentence is "which." In this sentence, "most of" is used to introduce a defining relative clause. The pronoun "which" is the appropriate word to use in such clauses to refer to things, not people. In this case, "lessons" is the thing that is being referred to. Therefore, the sentence should read: "My parents taught me a lot of lessons, most of which are difficult to forget."