Answer:
B.
She gave birth to a baby.
Postpartum depression (PPD) is a complex mix of physical, emotional, and behavioral changes that happen in a woman after giving birth. It's a serious mental health problem characterized by a prolonged period of emotional disturbance, occurring at a time of major life change and increased responsibilities in the care of a newborn infant.
The term "postpartum" refers to the period following childbirth. Therefore, if Fatima is experiencing postpartum depression, it most likely means that she recently gave birth to a baby. The other options provided (A, C, and D) do not directly relate to the term "postpartum" and are therefore less likely to be correct.