Matrix (multiple choice)
This element presents the respondent with an array of columns and rows. Each cell of the array can be configured with a list of selectable items. These selectable items can be presented to the respondent through the following cell types:
Dropdown, Checkbox, Radiogroup, Single Input, Comment, Boolean, Expression, Rating. The number of columns and rows, the titles of rows, and the value of the selectable items can also be edited via Activity element settings.