still not sure why I'm getting the wrong answer..

Consider the following generic two-step reaction mechanism. Step 1: A + B k2k1C Step 2: A+Ck3B+D Match the expressions to complete the equations, making use of the Steady State Approximation. A k2k1k3[A]2[B] k1[A][B]k2[C]k3[A][C] c k1[A][B] Dk3[A]k1[A][B] Ek2+k3[A]2k1k3[A]2[B] Fk2k3[A]k1[A][B] G k2+k3[A]k1k3[A]2[B] H k2+k3[A]k1[A][B] I None of the above =dtd[C]=[C]=dtd[A](inallinstances)dtd[D](whenk3k1k2)dtd[D](whenk3k1k2)