Question: 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.

Options

A : {1}, {2, 4}

B : {1}, {1, 2, 3}

C : {1}

D : {1}, {1, 3}, {1, 2, 3, 4}, {1, 2, 3, 5}

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