A scrum team decides that the frequency of the Daily scrum should be reduced to once a week. a) The Scrum team is self managing and can choose their own practices. b) Self Management is alright, but such decisions need to be approved by Agile Coach. So they should involve the Agile Coach. c) Self Management is about how to get the Sprint work done but must follow Scrum. So the Scrum Master should strive to coach the Team on the essentials of Daily Scrum.