4. Ma'am Yolly represented the attendance of parents every card day as x +y = 35. Which of the following is TRUE about the parents attendance during Card Day? a. Thirty-five parents come to school every card day. b. Less than thirty-five parents come to school every card day. c. More than thirty-five parents come to school every card day. d. Not more than thirty-five parents come to school every card day.​