Sendo A = { 1, 2} , B = {2, 3} , C = {1, 3, 4} e D = {1, 2, 3, 4}, quais das sentenças abaixo são verdadeiras:
I) B ⊂ D II) A ⊄ C III) C ⊅ B IV) D ⊃ A

a) I, II
b) I, II, III
c) I,III
d) I, II, III, IV​
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