Two options work. Three start an argument.
Giving children a choice is standard advice and it does work. It also fails often enough that the failures are worth understanding, because they nearly all share one shape.
The choice has to be real and small
"Do you want to put your coat on?" is not a choice; it is an instruction with a question mark, and children detect the difference immediately. When no is not an available answer, offering the question teaches that your questions are decorative.
"Coat now or at the door?" is a real choice. Both answers are acceptable to the adult, and the thing being decided is the timing, not whether.
Why two and not four
Two options can be held in mind and compared. Four require ranking, which is a heavier operation, and open the door to a fifth option the child invents. The negotiation that follows is not defiance — it is the natural consequence of a menu.
Every option you offer is one you have agreed to accept. Do not put one on the list to be polite.
Choice is spent, not free
A child offered choices about everything gets no signal about which decisions matter. Most families find it works better to spend choice on the two or three transitions that go badly and leave the rest as plain statements.
When it stops working
If a child begins refusing both options, that is usually information rather than escalation. Frequently the real problem sits upstream — hunger, tiredness, or something that happened earlier in the day that nobody has mentioned yet. No arrangement of options fixes a problem that is not about the options.
What to try this week
Take your worst transition and write down two versions of it you would genuinely accept. Offer exactly those, in six words or fewer, and hold to whichever the child picks — including when they pick the one you were hoping against.