The inclusion of ______ sets into R = {{1, 2}, {1, 2, 3}, {1, 3, 5}, – McqOptions

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1.	The inclusion of ______ sets into R = {{1, 2}, {1, 2, 3}, {1, 3, 5}, {1, 2, 4}, {1, 2, 3, 4, 5}} is necessary and sufficient to make R a complete lattice under the partial order defined by set containment.
A.	{1}, {2, 4}
B.	{1}, {1, 2, 3}
C.	{1}
D.	{1}, {1, 3}, {1, 2, 3, 4}, {1, 2, 3, 5}
Answer» D. {1}, {1, 3}, {1, 2, 3, 4}, {1, 2, 3, 5}

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