Which rule describes the composition of transformations that maps triangle ABC to triangle cap A double prime cap b prime cap c double prime ?
A
r sub m circ cap r sub cap b prime comma 270 degreesB
cap r sub cap b prime comma 270 degrees circ r sub mC
cap r sub cap b prime comma 90 degrees circ r sub mD
r sub m circ cap r sub cap b prime comma 90 degrees