Question: Which of the following illustrates a closed boundary in a family system and subsystem (e.g., parents/adults only)? Need Assignment Help? Group of answer choices a. "Don't discuss this with anyone outside our family; it's family business only." c."Let's agree not to argue or fight in front of our children; we shouldn't involve them in matters that are our business" d. Only a and c b. "We are the Smith family; we always reach out to friends and family when we are experiencing trouble in our lives"