The correct answer is wail.
A. lull to sleep
C. proceed slowly
The correct answer is (B) To wail; to lament loudly and shrilly; to utter shrill howling wordless lamentations. Also, to howl, as a dog or a wolf; to hoot as an owl.
Ululate comes from Latin ululare (to howl, shriek).
Examples of use:
- Inhabitants of many Middle Eastern cultures ululate to express their grief.
- The many voices that were ululating alerted him to the tragedy.