5. Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10^n ?

A.)The value of "A" must be greater than or equal to 1 and smaller than 10.

B.)The value of "N" must be an integer.

C.)Doubling "N" results in a doubling of the value of the expression.

D.)Doubling "A" results in a doubling of the value of the expression.

Please help.
I'm not sure what the answer is.
Thank you.