What is true concerning fastpath versus interleaved mode in DMT DSL service?

What is true concerning fastpath versus interleaved mode in DMT DSL service?

A.
Fastpath mode provides lower latency (delay) than interleaved mode.

B.
Fastpath mode allows higher DSL trained rates.

C.
Fastpath mode allows higher effective throughput on noisy transmission lines.

D.
Interleaved mode ensures that all provisioned ATM PVCs on a DSL line are given equal bandwidth.