What is rapid change in mood? ? ? (i already know it but just asking)

Mood swings refer to rapid changes in mood. The term may refer to minor daily mood changes or to significant mood changes as seen with mood disorders such as major depression or bipolar depression. Mood swings can also occur in women who suffer from premenstrual syndrome or premenstrual dysphoric disorder.

Explanation:

wellness is the state of being in good health, especially as an actively pursued goal.

i think the answer is d.