These nine basic training principles apply to sports training. With regards to location, the training principles that could influence it is the specificity, variation and overload. Specificity refers to the type of exercises you do based on the type of sport you play. Variation is when you do not only focus on one part of your body. Lastly, overload is adding additional stress to your body to achieve progression. These all influence location whether it has amenities that could cater to the type of exercises that you do. Does the location allow you to have a hold of resources for overload? Does the location have different sections that allow your body for variation? Does the place cater to your specific sport?
I would say that the answer is D. Hope this helps...
My personal, tentative wild guess is: <em>apnea</em>
