If doughnuts are usually 75 cents each, but there is a sale on friday advertising them a 1 dozen + 1/2 dozen for $ 10.80 so what is the new cost for just one

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.