Read the following context and choose the best option to answer the question.
Context: I could n't think for the life of me what this stuff could be . But I started grabbing clothes and shaking them outside to rid them of as much mystery substance as possible . I was still wracking my brain when , as I shook out another handful of clothes , a diaper flew out .
Question: What may be the reason why a diaper would be in with clothes ?
Options: 
- Because they are messy .
 - Because a diaper somehow got into the laundry to be washed .
 - Because they throw diapers in laundry piles .
 - Because they do n't dispose of diapers properly .


Because a diaper somehow got into the laundry to be washed .