Who changed the CIA's Benghazi talking points?

The question emerges from Petraeus's testimony today:

"The original talking points were much more specific about Al Qaeda involvement. And yet the final ones just said indications of extremists," King said, adding that the final version was the product of a vague "inter-agency process."...

Lawmakers are focusing on the talking points in the first place because of concern over the account Rice gave on five Sunday shows on Sept. 16, when she repeatedly claimed the attack was spontaneous -- Rice's defenders have since insisted she was merely basing her statements on the intelligence at the time.