Differential Gene Expression Is Defined as The

Differential gene expression is defined as the:

A) ability of some cells to arrest their development under varying environmental conditions.
B) progressive fixation of the fates of a cell's descendants.
C) genetic variation found in various somatic cells of the same individual.
D) regulation during development that varies the type and quantity of gene products among cells.
E) constitutive expression of all genes in the somatic cells.