Select the sentence from the article that BEST explains why collecting cells is important to medicine (A) Cells are the building blocks of life (B) We are all made up of cells. (C) Scientists study them to learn more about diseases. (D) Those cells were named Hela cells.

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there

is it multiple choice?

alzheimer's disease is a brain disease where you forget things that happened moments, even seconds before hand. reward me plz