A tailor is adding lace edging to 9 gowns. She needs 50 feet of lace for each gown. At the fabric store, lace is sold by the yard. How many yards of lace does the tailor need to buy in order to make all 9 gowns?
(1 yard = 3 feet)
A. 100 layers of lace
B. 450 layers of lace
C. 150 layers of lace
D. 300 layers of lace