The documents in Chapter 3 will be keyed in modified block letter style with mixed punctuation. Therefore, Group of answer choices begin the date line and the closing lines at the left margin. Begin all other lines at the left margin and indent the first line of each paragraph. begin the date line and the closing lines at the center point of the page. Begin all other lines at the left margin and indent the first line of each paragraph. begin the date line and the closing lines at the center point of the page. Begin all other lines at the left margin