His motto about our country's development is that we have to educate our children so that they grow up to lead our country in a very smart way. Until he passed away, he strongly insisted (it/on it)
I myself made this writing so as to ask this question.
My question is that if "it" is indicating the bold part of the sentence, which option is correct to use? It or on it? Must we use "on it" even if it's indicating a sentence? Though I sure think of "on it" as a correct option as "it" is a pronoun grammatically, just asking out of curiosity.