C, this is because it talks about the different chemicals in the air which can cause cancer. The other answers are vague statements about other things, not poisonous dust.
Answer:
1. "His proffesinal attitude identifies him as the protagonist"
Explanation:
From what I read he seems intrested in the violin and the guy which makes me believe he is a protagonist.
Answer:
First of all, you'll need to draw up a schedule. Make sure it's realistic as there's no point in creating one that you have no hope of sticking to.
Also, make sure it includes a mix of weights and cardiovascular training as well as at least one rest per week.
It may be tempting but, don't make the mistake of going too hard or too fast. Not only are you more likely to injure yourself this way but, recent studies have shown that you won't benefit as much from your training either.
The most important thing, however, is to enjoy your training. Remind yourself everyday just why you are training and what you hope to achieve from it.
hope that helps
Explanation: