C causes central nervous system damage to humans
I believe it's A. If an organism changes and evolves slowly over time it is caused by variation, which helps the species adapt to it's habitat and way of life
Answer:
This is true, because the advent of genetic engineering and different nutritional researches have greatly enhanced the Nutritional values in foods, with resultant increases in the growth and development of cells and tissues from increase growth hormones metabolism. However, reduction in the outbreak of disease, due to advancement in medical research and drug manufacturing are another factors which may contribute to this
Explanation:
B is your answer hope this helps