Approximately what percentage of women develops depression in the first 6 months postpartum?

For years researchers thought the bond that formed between a child and caregiver was due to the caregiver's physical nourishment of the child. Research by Harry Harlow indicates __________

a) physical nourishment is the glue that bonds child and caregiver. b) contact comfort is the glue that bonds child and caregiver. c) emotional nourishment is the glue that bonds child and caregiver. d) there is no one definable component that leads to attachment.

We are interested in what the text calls "probable limits" because

a. we want to know whether a piece of data is unusual. b. we want to have a good idea what kinds of values to expect. c. we might want to know whether values below some specific value are improbable. d. all of the above