I think it should be orange because mars is s red
A business letter should use formal language
You can definitely say something about the firefighters, and the police men and the positive affects they had on the nations civil forces. You can also talk about the actual plane fliers, and how they negatively affected the countries views of Muslim's as well as the affect that terrorists had on the United States from this one attack.
During a lecture in class I was talking to my best friend about our argument yesterday. The bell rang and I hadn’t been able to take the notes necessary for our Unit Test. I came to class the next day and did really bad on our test. By not paying attention I was able to negatively effect my grade. Since that day I began to pay more attention in class.
The answer is B because it doesn't have any commas and it wouldn't make sense without it. Looks like you got it correct.