You need to reverse direction on a two-lane road and decide a three-point turn is safer than a U-turn because it is slower. Does that change where you are allowed to do it?

Correct answer: A. No — a three-point turn is barred from the same places as a U-turn, and taking longer over it makes poor visibility worse, not better

No — the Handbook rules out the same places for both. A U-turn is illegal "on a curve in the road, on or near a railway crossing or hilltop, or near a bridge or tunnel", and it repeats, for the three-point turn, that it cannot be made "on a curve in the road, on or near a railway crossing or hilltop, or near a bridge or tunnel." The reason the lists are identical is that the hazard is identical: what makes those places dangerous is that an approaching driver cannot see you in time, and taking longer over the manoeuvre makes that worse rather than better. For a U-turn the Handbook adds a sight-distance test — you need to be able to see at least 150 metres in both directions — and the same judgement should govern any turnaround.

Source: MTO Driver's Handbook: Official MTO Driver's Handbook — Changing directions, U-turn and Three-point turn