A cousin sends you a picture from his work in Fort McMurray with him standing beside a rock truck. In the picture, your cousin is 2.5 cm tall and the truck tire is 5.3 cm. In reality, your cousin is 18. How tall is the rock truck tire in reality?

A) 2.5 cm
B) 5.3 cm
C) 18 cm
D) Not enough information provided