12. In a typical transaction There is one signature that comes the puts Each input contains a watu There is one signature that comes all the output Each output contains are 13. The Bank of International Settlements (BIS) invented the so-called money flower diagram to characterize central bank digital currencies (CBDC). Which of the following characteristics about CBDC does not fit Bitcoin? A Widely accessible B. Central bank issued 14. Which of following is NOT what we typically assume a Byzantine node is capable of? Notanding messages whened to Sanding different value to diferent pen when she same found Pretending to another te Delay and games 15. Which of the following is NOT a stablecoin solution A B Tether MADA 0 dy D 16. Which of the following is NOT a DeFi project? A Unap 1. Compound 17. Which of the following is NOT a blockchain scaling solution? Increasing tecke Creating block Layer 2 Sharding 18. On a remote island lives a tribe of indigenous people, among whom two have blue eyes, and the rest have brown eyes. Initially no one ever knows their own eye color. A tribe rule stipulates that if a person on the island ever discovers he/she has blue eyes, he/she must leave the island at dawn; anyone not making such a discovery always stays. Furthermore, although each person knows every other person's eye color, they are not allowed to communicate on eye colors a rule that all islanders adhere to. There are also no reflective surfaces. One day, an outsider comes to the island and makes a public announcement to everyone: "At least one of you has blue eyes". It is common knowledge that the outsider is honest (everyone knows he is honest, and all know that all know this, and so on), and thus it becomes common knowledge that there is at least one blue-eyed islander. Assuming that it is common knowledge that all persons on the island are completely logical, which of the following will happen? A. On the next dawn both blue-eyed people leave the island B. On the next dawn one of the two blue-eyed people leaves the island C. On the dawn after the next both blue-eyed people leave the island D. No one ever leaves the island