Given the following sets.

a = {0, 1, 2, 3}

b = {a, b, c, d}

c = {0, a, 2, b}

find b u c

a. {0, 1, 2, 3}

b. {a, b, c, d}

c. {0, a, 2, b}

d. empty set

e. {a, b, c, d, 0, 2}