fix: announce instructional paragraphs when navigating choice options

[jesusbalderramawgu]

Description

Small change to fix an accessibility issue, Question Content Not Programmatically Associated With Answer Choices
more details in the issue

Change

• Detected the instructional text (like "Instructions:" and the sentence to analyze) that appeared before each question but wasn't linked to it.
• Gave that text a unique reference so the question's answer group knows it exists.
• Attached that reference to each checkbox and radio button of the question, so assistive technology sees them as part of the same context.
• Made sure the reference is placed on the actual control (input) that receives keyboard focus, since that's where screen readers look.

How I tested this

• Turned on VoiceOver on macOS Safari and enabled description reading.
• Tabbed through the checkboxes in Question 2 and Question 5 — confirmed VoiceOver announces the instructions and the sentence along with each option.
• Checked in Chrome DevTools' Accessibility panel that each option's description shows the instructional text.
• Tabbed through Questions 1, 3, and 4 (which have no extra instructions) — confirmed nothing extra is announced, so the change only affects questions that need it.

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