Answer:
Go to bed at the same time every evening and wake up at the same time in the morning.
Explanation:
Some man-made fibres, too, are derived from naturally occurring polymers. For instance, rayon and acetate, two of the first man-made fibres ever to be produced, are made of the same cellulose polymers that make up cotton, hemp, flax, and the structural fibres of wood.
D is the answer (Aa and aa ) i hope this helps