Read the following context and choose the best option to answer the question.
Context: I could n't believe it because I did n't think I made mistakes like that . Fuuuuuck . He also revamped the long winded version before I could tell him it was the wrong one . No matter , I guess all my prospective employers will get to see every bit of work I have done since like ' 98 .
Question: What may be the reason for them making those mistakes ?
Options: 
- They do n't have enough knowledge .
 - They do n't have a degree .
 - They are sloppy in their work .
 - They did n't double check things .


They did n't double check things .