To determine the height of one stair, we would need to know additional details from the drawing you mentioned, such as the total height of the stairs and the number of stairs.
However, since I don't have access to the drawing, I can't provide a definitive answer. If you could provide more details about the number of stairs or any specific measurements given in the drawing, I could help you calculate the height of one stair.
Based on the choices provided, if the height of the stairs is given by a formula or relationship in the drawing, you might want to divide the total height by the number of stairs to find the height of one stair.
For example, if the total height of the stairs is 36 inches and there are 3 steps, then the height of one stair would be:
\[ \text{Height of one stair} = \frac{\text{Total height}}{\text{Number of stairs}} = \frac{36 \text{ in}}{3} = 12 \text{ in} \]
If you can provide more specific information, I'll be glad to assist further!