Question about The great hunt

[Bandobras Took]

The Ahunt Dragons create an attack that is considered a hazard creature attack.

Therefore, Crows can cancel it.

However, there is no creature card. That part of the effect fizzles.

[miguel]

What about Ahunt Dragons, then?

a) Are they returned to owner's hand when RoBC is used to cancel the attack?
or
b) Is the attack not canceled at all because the long-event may not be returned to owner's hand?

A) is correct.