C, I think. A looks good, but B is missing a comma.
Why does he suggest offers and options? Kennedy offers to his audience that we should replace violence towards one another with an effort to understand with compassion and love
The correct option is J “proven is that” since no comma is needed after the word “proven”. Grammatically speaking, commas are used to help in the meaning of a sentence by grouping and separating words or clauses. By using commas, a sentence can avoid misunderstanding, but in this case the comma is not necessary to have a clear meaning on its own.
Lily managed to work out the sum by herself.