The nurse helps a breastfeeding mother change the diaper of her 16-hour-old newborn after the first bowel movement. The mother expresses concern because the large amount of thick, sticky stool is very dark green, almost black in color. How should the nurse respond to this mother's concern?

Asking the mother what she ate at her last meal

Suggesting that the mother ask her pediatrician to explain newborn stool patterns to her

Telling the mother not to worry because breastfed babies have this type of stool

Explaining to the mother that the stool is called meconium and is expected of all newborns for the first few bowel movements