11. Which one of the following describes the advantage of using Bitcoin as a currency for transactions? A. Transaction records are permanently built into system but they can be easily erased or faked. B. Personal privacy (name, gender, physical address, etc.) of bitcoin users is well protected by encryption and can hardly be decoded and revealed to public. C. Bitcoins stored in personal computers and exchange platforms are well protected from hackers. D. All of the above are correct 12. Which one of the following is NOT an indicator of potential manipulations in the cryptocurrency market? A. Large-size trades make more money than small-size trades B. The individual currency price is tightly correlated with the entire market or the overall economy C. A few of individuals hold most of the cryptocurrency D. The price movements in the short-term is extremely volatile 14. Consider the graph of a call option shown below. The option is a three-month American call option with a strike price of $1.50 = 1.00 and an overall option premium of $3,125. For each pound in the option, what are the profits (losses) at point A, B, and C, respectively? Profit A. A = $.05; B = $1.50; C = $1.55 B. A = -6.06; B = $1.50; C = $0 C. A = -9.05; B = $1.55; C =$1.60 D. A=-$.05; B=-$.05; C = $1.60 E. A=-$.05; B = $.05; C = $0 s, 1 00- loss 15. Please describe the information contained in Bitcoin blockchain (4 points) And how do the bitcoin miners contribute to the building process of the blockchain? (3 points)