Answer: The value of 'x' is 31.
Step-by-step explanation: As shown in the modified attached figure, AC and BD are two intersecting chords, where ∠CBD = x° and ∠CAD = 31°.
We are to find the value of 'x'.
The measures of the angles on the circumference of a circle subtended by the same chord (arc) are equal.
In the attached figure, ∠CBD and ∠CAD are angles subtended at the circumference of the circle by the same arc CD.
Therefore, we must have
Therefore, the value of 'x' is 31.
Thus, (B) is the correct option.