I was supposed to go last night after work , but I was so hungry and preoccupied with the scheduling issues , that I completely forgot to go to the gym . Can you believe it ? It 's such a pain to rearrange things and force people to use their vacation days . That 's right , Castro told me to tell people to use their vacation days so they would have enough days off .

Question: What may be the reason for you forgetting about the gym ?
Answer: None of the above choices .I had other things to get done .I was exhausted after getting other things done .I stayed late at work .