Some firms benefit from the speed and efficiency of blockchain technology to manage their supply chains. Optimally, firms that want to participate in a supply chain based on blockchain technology must be mutually vetted to establish their trustworthiness. But there are challenges to this fundamental principle. Select two from the list below. 

Group of answer choices

choices private blockchain groups does not operate globally; therefore, vetting is almost impossible collaboration among participating firms in a private blockchain needs a governance mechanism to determine the rules of the system the open and decentralized structure of blockchain risks privacy

participating firms must be certified by the government agencies

 Dr. Cahill ordered a delivery of groceries from Walmart. She is vegan, a category of grocery that is difficult to find on Walmart's pickup and delivery website. Thankfully, Walmart retains her most frequent choices, and early in her buying journey, Walmart guides her to purchases. What is this strategy called? Fill in these two blanks. "  strategy." TIP: The first word starts with a "c" and is 7 letters; the second word starts with an "o" and is 8 letters.