Diva, I think Daisy must have gone looking for Cara (the one whose teeth Mitchell knocked out, because she had broken the "ceasefire". He was supposed to have killed her. Daisy was pressuring him strongly to do so, so must have checked afterwards). Cara said Daisy had brought a kid to her, and had healed her. The two must have set out to find Herrick's grave, then bled over it, to resurrect him. Cara was just saying that blood would resurrect Herrick, as it had healed her (C).
As for Daisy's motivation, I guess (1) Cara persuaded her (Cara had a personal pash for Herrick, and she never would have been "punished" under his regime), (2) Daisy could not put Ivan above Herrick (Ivan was no kind of leader), so did her duty (after all, Herrick might do a mass resurrection later).
The presence of the two women at the grave was so like the imagery of the witnesses of Christ's crucifixion and resurrection (I think it was Mary Magdalene and possibly Mary His mother), that it must have been deliberate.
I think that's it. Unless I've included a howler someone else would like to tell me about?