Read the following context and choose the best option to answer the question.
Context: The drive to work was crazy as well due to some extremely heavy rain ! I do n't believe I went over 30 mph this morning ( when I ' m normally pushing 80 mph on the highway ) . I get in to my office and had some insane phone calls to return . It 's been one of those days ... er weeks !
Question: What is the reason " I think " it 's been one of those days ... er weeks ! "
Options: 
A. It is n't two of the weeks .
B. It is ONE of the weeks not every one .
C. None of the above choices .
D. It is a day but does n't feel very long .


C