If the Number of Parking Spots at Urban Grocery Stores $\le$

If the number of parking spots at urban grocery stores is uniformly distributed over the interval 90 to 140,inclusively (90 $\le$ x $\le$ 140) ,inclusively (90 $\le$ x $\le$ 140) ,then the mean of this distribution is __________________.

A) 115
B) 230
C) 45
D) 70
E) unknown