AMC8 2000 Problem 10

Ara and Shea were once the same height. Since then Shea has grown 20 \% while Ara has grown half as many inches as Shea. Shea is now 60 inches tall. How tall, in inches, is Ara now?

Answer Choices
A. 48
B. 51
C. 52
D. 54
E. 55