Ava and Kendra want to estimate the height of a tree. On a sunny day, Ava measures Kendra's shadow as 3 meters long, and Kendra measures the tree's shadow as 15 meters long. Kendra is 1.5 meters tall. How tall is the tree?
A) 7.5 meters
B) 22.5 meters
C) 30 meters
D) 45 meters