If Ricardo’s conjecture is true, which of thes following must be true for Quadrilateral WXYZ to be a parallelogram? ?

B and C must be true.

B and C must be true.

If you look at the top and bottom sides, the diagonal XZ forms a transversal. If the two angles mentioned by Ricardo are congruent, then those two sides must be parallel, by the converse to the Alternate Interior Angles Theorem.
Answer:B) WX || YZ

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