Mashaal Masha
In North America, the standard width of a parking space is at least 7.5 feet and no more than 9.0 feet. A restaurant owner recently resurfaced the restaurant's parking lot and wants to determine the number of parking spaces, $n$, in the parking lot that could be placed perpendicular to a curb that is 135 feet long, based on the standard width of a parking space. Which of the following describes all the possible values of $n$?
Difficulty: Medium
A: 

$18\leq n \leq 135$

B: 

$7.5 \leq n \leq 9$

C: 

$15 \leq n \leq 135$

D: 

$15 \leq n \leq 18$

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