Select Multi-Answer Drop Down List

I have a Matrix Table, Profile, Drop Down List. Each list has unique categories, but I want a user to have the ability to select multiple answers. Any idea how to do this? I know I can do the Matrix Table, Profile, Multiple Answer, but some answers will have only 3 and others will have up to 8 options to choose from. I like the Multiple Selection Box option, but I will have multiple categories that I want customers to review and I want them to all be within the same question. I currently have this javascript to only show Scale Points if the option is not blank. Qualtrics.SurveyEngine.addOnReady(function() { jQuery("#"+this.questionId+" select option:first-child").text("Select one"); jQuery("#"+ this.questionId + " option").each(function () { if (jQuery(this).text().length < 2) { jQuery(this).hide(); } }); });