To qualify for gold status at Awesome Airlines, one must fly at least 14,400 and less than 24,000 miles each year. If Lance takes a 600-mile round-trip flight to visit his parents, how many times does Lance need to visit his parents each year to attain gold status? Express your answer in interval notation.
a) [23, 40]
b) [24, 40]
c) [25, 40]
d) [26, 40]
