Decipher allows you to change a column in a 2-dimensional multi-select question into single select form. This is can be used in awareness questions where you'd also like the respondent to select a favorite option that utilizes a single-select form.
To change a column in a mutli-select question to single-select, click on the "favorite" column so the options appear in the right panel. In the "Мore Оptions" dropdown menu, select "favorite." The favorite option will be added; check the box to enable it. When favorite is enabled for an answer option the respondent will only be able to select one response for that column.
An example is shown below. The respondent can select multiple responses for each of the first two columns and the "Favorite" column is restricted on one answer.