If U = { 1 , 3 , 5 , 9 , 11 , 13 } , then which of the following are subsets of U ?

B = { 2 , 4 }
A = { 0 }
C = { 1 , 9 , 5 , 13 }
D = { 5 , 11 , 1 }
E = { 2 , 3 , 4 , 5 }