The diagram shows a wiring closet stack of four L2 switches A1, A2, A3, and A4. A1, A2, A3, and A4 are connected in series. Switch A1 is the root switch and connects to R1 and R2. There are no loops in the wiring closet VLAN (=subnet). The architect wants to remove X, Y, and Z, and connect A1 directly to A2, A3, and A4 in a star. Is this a good idea?

A.
Yes, because packets from R2 to host 10.0.1.2 will take fewer L2 hops.

B.
Yes, because with A1, A2, A3, and A4 in series, link Z will become a bottleneck.

C.
No, because switch A1 will becomes a bottleneck.

D.
No, because A1 must be replaced by a L3 switch.

E.
No, because it will create a STP loop.