Given the following sets.
A = (0, 1, 2, 3}
B ={a, b, c, d)
C =[0, a, 2, b)
Find B u C
• empty set
O (a, b, c, d)
O [0, 1, 2, 3)
O (0, a, 2, b)
O [a, b, c, d, 0, 2}