What Philosophical Problem About Grief Is Suggested by the Case

What philosophical problem about grief is suggested by the case of C.S. Lewis' grieving the death of his wife Joy?

A) Grief is irrational but unavoidable.
B) Grief involves emotional states we ordinarily have reason to avoid but grief nevertheless seems valuable or worthwhile.
C) Grief is often more emotionally complex than we anticipate.
D) Grief involves emotional states we ordinarily have reason to pursue but nevertheless seems bad or undesirable.