If a variable takes the discrete values $\alpha + 4, \alpha - \frac{7}{2}, \alpha - \frac{5}{2}, \alpha - 3, \alpha - 2, \alpha + \frac{1}{2}, \alpha - \frac{1}{2}, \alpha + 5$ where $\alpha > 0$,then the median of these values is:
- A$\alpha - \frac{5}{4}$
- B$\alpha - \frac{1}{2}$
- C$\alpha - 2$
- D$\alpha + \frac{5}{4}$
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