To calculate the circumference of a circle, you can use the formula:
\[ C = \pi \times d \]
where \(C\) is the circumference and \(d\) is the diameter.
Given that the diameter \(d\) is 4.5 miles and using \(π \approx 3.14\), we can calculate:
\[ C = 3.14 \times 4.5 \]
Calculating this:
\[ C = 3.14 \times 4.5 = 14.13 \]
So the circumference of the circle is approximately 14.13 miles.
Therefore, the correct response is:
14.13 miles.