A nurse is caring for a postpartum client and is explaining the process of involution. Which of the following statements is true?

The postpartum uterus returns to its pre-pregnancy size by 8 weeks postpartum.

At the end of the third stage of labor, the postpartum uterus is positioned 3 cm above the umbilicus.

The decline of estrogen and progesterone causes self-destruction of excess uterine tissues.

After 2 weeks postpartum, the uterus can be palpated above the symphysis pubis.