Can we draw the following hypothesis from the context (see options)? 

Context:

How to recognize the signs of parkinson's disease<br>Notice any shaking or twitching. When you think of parkinson's disease, the first thing to come to mind may be tremors. These can occur anywhere on the body: a shaking finger or leg, a twitching eye, a trembling lip or chin, etc.

Hypothesis: parkinson's disease affects the central nervous system.
pick from the following. -Yes; -It's impossible to say; -No;
It's impossible to say