This is on purpose. The Discovery Survey is a forced choice assessment.
When you have answered the question correctly, the "Next" button will enable you to move on to the next question. Read the instructions carefully below:
In the Priorities and Preferences section, you must:
Choose one statement that's LEAST LIKE YOU and one statement that's MOST LIKE YOU. One statement will be blank.
In the “You” Descriptors section you must:
Determine which descriptors are LEAST LIKE YOU and MOST LIKE YOU, and select the appropriate checkbox. You can only choose three (3) of each, and you cannot select both checkmarks on the same descriptor.