Accessibility

[jeff-eng]

• [x] Unable to tab through answer choices
• [x] Can't select answer choice with keyboard
• [x] Button is not in tab index

[jeff-eng]

Because the button is disabled when all answers are not selected, it's out of the tab index. I'll need to add a warning message that communicates to user that not all the questions have been answered.

[jeff-eng]

• [x] ARIA accessibility - labels, inputs, etc.