Susan bought two pairs of earrings for $3.00 each. By purchasing 2 pairs, she received one pair free. What was the average price for each pair of earrings?

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.