Alternate Responses can be added if there is more than one correct overall solution to a Question.
To allow Alternate Responses, first create an Item and Question as normal. In the correct response section, click on the "+" beside the Correct tab - as shown in Figure 1.
Figure 1: Add a new alternate response.
A new tab called Alternate 1 will appear. Click on "+" once again to add more alternate responses. They will appear as tabs beside each other. If you want to remove the alternate response, click on the trash can icon on the alternate response panel. See Figure 2.
Figure 2: Deleting an alternate response.
Some answers may need to be awarded different scores, depending on the list of alternate responses. This is managed by changing the value in the Points field.