Troubles passing json to onclick function

Question

I'm actually working on this json received after an ajax call:

{
  "1": {
    "ONClick": "OpzioneUnoDellaDomandaUno",
    "apre": [
      "DomandaNumeroDueDelQuestionarioUno"
    ],
    "chiude": [
      "DomandaNumeroTreDelQuestionarioUno"
    ]
  },
  "2": {
    "ONClick": "OpzioneDueDellaDomandaUno",
    "apre": [
      "DomandaNumeroTreDelQuestionarioUno"
    ],
    "chiude": [
      "DomandaNumeroDueDelQuestionarioUno"
    ]
  },
  "3": {
    "ONClick": "OpzioneTreDellaDomandaUno",
    "chiude": [
      "DomandaNumeroDueDelQuestionarioUno",
      "DomandaNumeroTreDelQuestionarioUno"
    ]
  },
  "4": {
    "ONClick": "OpzioneQuattroDellaDomandaUno",
    "chiude": [
      "DomandaNumeroDueDelQuestionarioUno",
      "DomandaNumeroTreDelQuestionarioUno"
    ]
  },
  "5": {
    "ONClick": "OpzioneUnoDellaDomandaDue"
  },
  "6": {
    "ONClick": "OpzioneDueDellaDomandaDue"
  }
}

What ì'm trying to achieve is to give an onClick event to each IDOption and inside this onclick function i need to display the IDToOpen and hide the IDToClose. If i console.log the variables open or close outside the function click i get the whole object. But if i console log it inside the onclick function i think i only get the last one.

                var dataJson = JSON.parse(data);
                //console.log('Ramification: ', dataJson);
                
                for (var key in dataJson) {

                    if (dataJson.hasOwnProperty(key)) {
                        var IDOption = document.getElementById(dataJson[key].ONClick); 
                        var open = document.getElementById(dataJson[key].apre);
                        var close = document.getElementById(dataJson[key].chiude);
                        var IDToOpen = document.getElementById(open.id);    
                        var IDToClose = document.getElementById(close.id);
                        
                        console.log(IDToOpen); // i get the whole object
                        console.log(IDToClose); // i get the whole object


                        IDOption.addEventListener("click", function(){
                            
                          console.log(IDToOpen); // i think i get the last one
                          console.log(IDToClose); // i think i get the last one

                          IDToOpen.style.display = 'flex';
                          IDToClose.style.display = 'none';

                        }); 
  
                }


            }