Write a question about the following article.

After watching the tv and then driving to work , I knew that things would never be the same . It is hard to express the feelings that I had during that day , the loss , helplessness , and the fear of not knowing if this was all , or was there still more to come . Now , seven years later , I still feel a number of those feelings , but I guess the biggest is the loss . When I see a program about this day , I feel that I am reliving the same emotions .

Question:
What event might they be speaking of ?
Available options:
[a]. They 're talking about a death of a friend .;
[b]. They 're talking about a miscarriage .;
[c]. They 're talking about 9/11;
[d]. They 're talking about the death of a parent .;