location of the cell in the body function of the cell in the body different patterns of gene expression different combinations of genes in the nucleus
I gave my students this multiple choice question: Which of the following allows a cell to become specialized?

Only one answer is correct among these 4 choices:
- location of the cell in the body
- function of the cell in the body
- different patterns of gene expression
- different combinations of genes in the nucleus

Could you tell me which one is correct?

different patterns of gene expression