Which of the following statements is true regarding team members?

A、TeammembersarerequiredtohaveSixSigmaBlackBelttraining
B、Teammembersarenotresponsibleforcontributingfullytotheproject
C、Teammembersarenotrequiredtocarryoutassignmentsbetweenmeetings
D、Teammembersarenotsolelyresponsibleforimplementingchanges