So teacher I just  finished my quiz for today, so I think the quiz is not hard, but I have a few question that I don't understand, like some time they gave you a question, and when you starting to answer the question you feel like they try to trick you and make you confuse too. I need you help me on this question the I don't know, today this question is they want me to  click on Omit if the underlined word or words can be omitted, and click on Needed if the underlined word or words are needed for grammar or logic. so the question is here ( Christopher had an attention span longer than that of the other students. ) ( A. Omit B. Needed ) I don't really understand. I need help on that.