James , in a fit of laughter slapped Artie 's back , and for some reason , this caused Artie 's head to randomly explode . James stopped laughing and turned to look when his horse suddenly reached up , with its neck stretching to accommodate its actions , and bit off James ' head . Both human bodies then fell off their horses , only to sink like bricks in quicksand in a pile of horse manure .
According to the above context, choose the best option to answer the following question.
Question: Where were James and Artie when James slapped Artie on the back ?
Options:
A. None of the above choices .
B. They were riding their horses .
C. They were standing by the quicksand .
D. They were sitting in horse manure .


B