(8) then, she justified all of her mistakes and emphasized key points in all-caps letters. (9) then, she chastised him for the tone of his email. which of the following sentences best combines sentences 8 and 9?
she justified all of her mistakes, emphasizing her key points in all caps letters and she chastised him for the tone of his email.
she justified all of her mistakes, emphasizing key points in all-caps letters, then chastised him for the tone of his email.
she justified all of her mistakes, emphasized key points in all-caps letters, and then chastised him for the tone of his email.
she justified all of her mistakes, she emphasized key points in all-caps letters, and chastised him for the tone of his email.