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 or off. It depends on the cells function.

C genes can be turned on and off

Explanation:

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

Im going to try my hardest to explain this simply because its kinda hard but in 10 years the town would grow by 100% so take 3900 and figure out what 40% of 3900 would be (3900 x .40 = 1560) so add 1560 to the other 100% which is 5460 and then add that to the original population which is now 9360. So the population in 14 years would be 9360. The reason I went into depth is because most teachers want an explanation. and what grade is this???