What do you define by option?
He's probably the starter at Z.
However, the way they are currently talking about this offense, he's probably target 4 or 5 on most plays (Terry, Chig, Williams/Slot) being the first 3, Z/RB being 4/5, and we're talking about splitting ~32 passing snaps a game.
Now, they could change that plan at any point if they believed he was better than Chig and Williams/slot.
In that case, he might be the third option. I really think Chig is option 2 almost no matter what unless they traded for somebody like Higgins.