Find the median of the discrete values.
$$(a + 4), (a - 3.5), (a - 2.5), (a - 3), (a - 2), (a + 0.5), (a + 5)  and  (a - 0.5)$$.

A

$$a - 0.75$$

B

$$a - 1.5$$

C

$$a - 1.25$$

D

$$a - 2.5$$