Robo-caller "Lisa" with "Green Survey" telling me I was selected to receive an all expense paid Caribbean cruise for two for just answering a three question "survey".  Pure Scam!
Responded to her prompts to proceed with dead silence.  Was then informed by her cheerful, energetic robo-voice that I had to say "Yes" to proceed or "No" to be "removed from their lists for future calls".  Further silence elicited the response of "your number will be removed from our list" and a hang-up.

There may be a good chance the "Lisa" will not call me again from this number, but I am sure I will hear her robo-voice promoting the same scam again in the future from yet another number.

Maybe next time I will say "Yes" and hear what their survey questions are.  Although. I imagine they would equate to:
1. Are you dumber than a brick?
2. Do you have a debit or credit card?
3. What is the account number, expiration date, name on the front and three digits on the back of that card?

Now, I am off to the Do Not Call site to report this number.