Question

what is the purpose of a signal phrase?

Answer 1

It indicates that a quote or paraphrase is coming

Answer 2

Both of those are good answers. I would just try to talk to them about the question first tho, like try to lead them to the question. It's against the qc policy to just give them the answer. I would ask what they thought first, and if they're right then be like good job! If not then try to direct them to the right answer without giving it to them. But those are good answers! :)