Read the following context and choose the best option to answer the question.
Context: DAY 15909.10.07TREE 73With all the going ons of my show I did n't take the time to look ahead and see where I was going to be climbing today . When I did finally look it was the tree at Norman 's with the duck box . I told Norman and it was just too short of a notice to plan something . So I had to just drive over there by myself when he was n't home to climb the tree .
Question: Why could n't Norman come with me to climb the tree ?
Options: 
- None of the above choices .
 - Norman may have been busy but did n't want to .
 - Norman did climb the tree with me .
 - Norman may have been too busy to plan anything .


Norman may have been too busy to plan anything .