Hi @Hilaryacd ,
One possible solution for this can be using contact list and JS.
First - The contact list should be assigned before the multiple choice question block and Capture those option which you want to be selected as default choices in to embedded data.
Second - If they are non numeric, assigned them numeric values based on the recode values of multiple choice question.
Third - Select “Allow multiple answers”. Now, Go into JS of multiple choice question and put the below code which will work as default selected choices.
Fourth - The below example is to default select the first option of a multiple choice question. You can use a for loop for multiple selections.
JS
/*Place your JavaScript here to run when the page is fully displayed*/
var i = 1
var val = i;
if( val == 1){
this.setChoiceValueByRecodeValue(val,true)
}