Read the following article and answer the question by choosing from the options.

I had to verify in a couple of places to make sure the maid had n't just reset my clock while I was out . Saturday was kind of a blur , to be honest . I had an autographing session that was n't a complete failure , but I was sitting next to Stephen Baxter , who had a non - stop line and people having to get in line over and over again because of the three - item limit . It did n't help that only one dealer in the dealers ' room had my books at all , and they sold out on the first day .

Why did people have to get in the line over again ?
Possible answers: A. Because the maid had reset their clock while they were not there .. B. None of the above choices .. C. Because they had an autograph session to attend .. D. Because there was a three item limit and more than one person signing books and the people wanted more than one item .....A:
D.