Gene regulation means A. The genes in some cells are different than the genes in other cells.
B. only some specialized cells can become other specialized cells.
C. genes can be turned on and off.
D. all the genes must be turned on.​

C genes can be turned on and off

Explanation:

Gene regulation is the ability to induce or repress the expression of a gene

i think that d. wind is the answer.   i missed the question when i answered a. currents.

2%? i tried finding the exact sorry if it's not 100% correct ; -;