From the book

why does windrider punch black dog outside the opium den?

a.
windrider thinks black dog betrayed the company.

b.
windrider is defending himself.

c.
windrider is angry with black dog.

d.
windrider is trying to take him back home.

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long  

you need need more details so we can understand what your asking us.