Answer:
the answer is C.
Explanation: That is the answer, because we have to put a filter over it so we don't breath poisonous air.
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Aspiration can be positive since it allows motivation. For example, the aspiration of one day owning a car motivates a person to work hard. On the other hand, this can have a negative effect when the aspirations are are set too high and not met for instance, someone aspiring a goal of becoming a millionaire was not met. This could affect the person by causing them to loose all motivation and potentially loose themselves and other aspirations.
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Food-grade lubricants must perform the same technical functions as any other lubricant: provide protection against wear, friction, corrosion and oxidation, dissipate heat and transfer power, be compatible with rubber and other sealing materials, as well as provide a sealing effect in some cases.
Relax and go to a quiet place and study and make sure that you take breaks about 5 to 10 mins so u don't get to stressed out