Which of the following is not a circumstance of strengthening the authority of a precedent?

A "Closely divided opinion of the Court" tends to weaken rather than strengthen a precedent's authority, since a divided bench signals less settled reasoning, unlike "Approval of the decision in later cases and by the profession at large", "Evidence in the report that the issue was fully argued by counsel and the Court took time to deliberate" and the fact that "The decision has stood the test of time".