Answer:
the major factor is the decrease of deaths
I believe it is C.) Tasting a solution you think is edible after creating it in the lab.
I could be wrong though.
Every atom<span> is made </span>up<span> of </span>three kinds<span> of smaller </span>particles<span>, called protons (which are positively charged), neutrons (which have no charge) and electrons (which are negatively charged).</span>
The answer is carboniferous