If statement to allow single and multiple if options

I have an If statement dependent on a choice made in a google form. Everything currently works as needed BUT, the question choice allows them to choose ALL OPTIONS THAT APPLY. If more than one option is chosen, the script fails.

How it currently works - person fills out form, script grabs info and inputs to a document, gives specified message based on choice from question (cif and message in script below), then emails the correct recipient (chosen in form). It works beautifully if cif is submitted with one choice.

What do I add/edit to the script to allow for multiple choices, and therefore multiple messages input to the document, without having to write an If state for each scenario?

function onFormSubmit(e) { // add an onsubmit trigger
  
// Values come from the spreadsheet form  
   var observer = e.values[1]
   var teacher = e.values[2]
   var email = e.values[2]    
   var period = e.values[4] 
   var time = e.values[3]      
   var cif = e.values[5]    
   var comments = e.values[6]
   var message;
   if (cif == 'READ - Variety of texts') {
  message = 'read quote'
}
else if (cif == 'WRITE - Paper or electronic') {
  message = 'write quote'
}
else if (cif == 'THINK - Actively engaged students') {
  message = 'think quote'
}    
else if (cif == 'TALK - Purposeful discussion') {
  message = 'talk quote'
}        
else if (cif == 'MOVE - Students moving through class') {
  message = 'move quote'
}   
else if (cif == 'CIF not observed') {
  message = 'CIF not observed'
}  


// Get document template, copy it as a new temp doc, and save the Doc’s id
   var copyId = DriveApp.getFileById(docTemplate)
                .makeCopy(docName+' for '+teacher)
                .getId();
  
// Open the temporary document
   var copyDoc = DocumentApp.openById(copyId);
  
// Get the document’s body section
   var copyBody = copyDoc.getActiveSection();
  
// Replace place holder keys,  
  copyBody.replaceText('keyobserver', observer);
  copyBody.replaceText('keyperiod', period);
  copyBody.replaceText('keytime', time);
  copyBody.replaceText('keycif', cif);
  copyBody.replaceText('keycomments', comments);
  copyBody.replaceText('keymessage', message)