Which expression is equal to 6rs^9/42r^5s^2 s^7/7r^4 s^7/7r^5 7s^7/r^5 7r^7/s^4

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.