When Elliott Jaques Coined the Term Midlife Crisis He Based

When Elliott Jaques coined the term midlife crisis he based this term on which of the following?

A) His studies of clinical patients who were dealing with depression and angst about getting older.
B) His role as an addiction researcher, when supporting his patients through their alcoholism treatment based on their fears of aging and regret.
C) His patients in his physiotherapy practice who were seeking out advice on how to increase their physical endurance in order to delay aging.
D) His patients in his cosmetic surgery practice who were seeking out treatment to increase their physical beauty as a means to ward off aging.