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.
During their courtship and marriage, John Adams and Abigail Smith Adams exchanged over 1,100 letters, many filled with intellectual discussions on government and politics considered an invaluable account of the Revolutionary War. Abigail, a fierce advocate of rights for women and African-Americans, was an important partner throughout John's political career.
I believe it is called interjection:) good luck!
Because it has something covering it and he has to watch his back
