Read the following context and choose the best option to answer the question.
Context: It was quite a shock and I feel like all the progress I had made before I left has been totally wiped out . I was also aware though that I want to do a long run tomorrow and so I did not want to push it too hard either . So instead of speed I have gone for length and have just posted off my entry for the HIGHLAND FLING RACE 2009 !
Question: Why is the narrator not running very far today ?
Options: 
A. They are saving their legs .
B. They are overweight .
C. None of the above choices .
D. They lack cardio ability .


A