Which statement is represented by this inequality?

h ≤ 14
a) a sign on a bridge reads, "maximum height of vehicles is 14 feet."
b) a sign on a bridge reads, "maximum height of vehicles is equal to 14 feet."
c) a sign on a bridge reads, "maximum height of vehicles is greater than 14 feet."
d) a sign on a bridge reads, "maximum height of vehicles is greater than or equal to 14 feet."