Read the following context and choose the best option to answer the question.
Context: I also brought along my acoustic guitar and played for a while . Ouch , any callouses that I had built up from taking lessons are long gone from my fingertips . I also played on my harmonica a bit as well . All in all it was fun . I had a very hard time getting to sleep , and staying asleep .
Question: Why may the narrator have had trouble sleeping ?
Options: 
A. They were buzzed from playing music .
B. Their callous kept blistering .
C. None of the above choices .
D. Their callous started bleeding .


A