7. Which of the following physical changes is experienced by women during the luteal stage of the menstrual cycle?
a. Mood swings b. Changes in appetite c. Depression or sadness d. Headaches or
backaches​

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.